diff --git a/.github/workflows/build_cuda.yml b/.github/workflows/build_cuda.yml
deleted file mode 100644
index 3b627500..00000000
--- a/.github/workflows/build_cuda.yml
+++ /dev/null
@@ -1,36 +0,0 @@
-name: Build CUDA Linux
-
-on:
-  push:
-    branches:
-      - master
-    tags:
-      - '*'
-  pull_request:
-    branches:
-      - master
-
-jobs:
-  build_wheels:
-    name: Build wheel on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest]
-
-    steps:
-    - uses: actions/checkout@master
-
-    - name: Build wheels
-      uses: pypa/cibuildwheel@v2.23
-      with:
-        package-dir: backend/cuda
-        config-file: backend/cuda/cibuildwheel.toml
-        output-dir: wheelhouse
-
-    - name: Upload artifacts to github
-      uses: actions/upload-artifact@v5
-      with:
-        name: wheels-cuda-${{ matrix.os }}
-        path: ./wheelhouse
diff --git a/.github/workflows/build_cuda_windows.yml b/.github/workflows/build_cuda_windows.yml
deleted file mode 100644
index c0dd6020..00000000
--- a/.github/workflows/build_cuda_windows.yml
+++ /dev/null
@@ -1,64 +0,0 @@
-name: Build CUDA Windows
-
-on:
-  push:
-    branches:
-      - master
-    tags:
-      - '*'
-  pull_request:
-    branches:
-      - master
-
-env:
-  CUDATOOLKIT_URL: https://developer.download.nvidia.com/compute/cuda/12.6.3/local_installers/cuda_12.6.3_561.17_windows.exe
-  CUDATOOLKIT_COMPONENTS: nvcc_12.6 cudart_12.6 cublas_dev_12.6 curand_dev_12.6 cusparse_dev_12.6 thrust_12.6 visual_studio_integration_12.6
-
-jobs:
-  build_wheels:
-    name: Build wheel on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    defaults:
-      run:
-        shell: cmd
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [windows-2022]
-
-    steps:
-    - uses: actions/checkout@master
-
-    - name: Add msbuild to PATH
-      uses: microsoft/setup-msbuild@v2.0.0
-
-    - name: Add Windows SDK
-      run: |
-        choco install windows-sdk-8.1
-
-    - name: cache install cuda
-      id: cache-install
-      uses: actions/cache@v4
-      with:
-        path: C:\Program Files (x86)\Intel\oneAPI\
-        key: install-${{ env.CUDATOOLKIT_URL }}-${{ env.CUDATOOLKIT_COMPONENTS }}
-
-    - name: install cuda
-      if: steps.cache-install.outputs.cache-hit != 'true'
-      run: |
-        curl.exe --output %TEMP%\cuda.exe --url %CUDATOOLKIT_URL% --retry 5 --retry-delay 5
-        start /b /wait %TEMP%\cuda.exe -s %CUDATOOLKIT_COMPONENTS%
-        del %TEMP%\cuda.exe
-
-    - name: Build wheels
-      uses: pypa/cibuildwheel@v3.3.1
-      with:
-        package-dir: backend/cuda
-        config-file: backend/cuda/cibuildwheel.toml
-        output-dir: wheelhouse
-
-    - name: Upload artifacts to github
-      uses: actions/upload-artifact@v5
-      with:
-        name: wheels-cuda-${{ matrix.os }}
-        path: ./wheelhouse
diff --git a/.github/workflows/build_default.yml b/.github/workflows/build_default.yml
index d2e152b4..c32ae9cf 100644
--- a/.github/workflows/build_default.yml
+++ b/.github/workflows/build_default.yml
@@ -40,16 +40,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-latest
-            cibw_archs: "x86_64"
-          - os: ubuntu-24.04-arm
-            cibw_archs: "auto"
-          - os: windows-2022
-            cibw_archs: "auto64"
-          # Include macos-15-intel to get Intel x86_64 macs and macos-latest to get the Aaarch64 macs
-          - os: macos-15-intel
-            cibw_archs: "x86_64"
-          - os: macos-latest
+          - os: windows-11-arm
             cibw_archs: "arm64"
 
     steps:
diff --git a/.github/workflows/build_mkl.yml b/.github/workflows/build_mkl.yml
deleted file mode 100644
index 496b7465..00000000
--- a/.github/workflows/build_mkl.yml
+++ /dev/null
@@ -1,38 +0,0 @@
-name: Build MKL Mac/Linux
-
-on:
-  push:
-    branches:
-      - master
-    tags:
-      - '*'
-  pull_request:
-    branches:
-      - master
-
-jobs:
-  build_wheels:
-    name: Build wheel on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        # macos-latest now uses arm64 runners, but MKL is x86_64 only, so restrict to the macos-15-intel runners
-        # to get x86_64 architecture.
-        os: [ubuntu-latest, macos-15-intel]
-
-    steps:
-    - uses: actions/checkout@master
-
-    - name: Build wheels
-      uses: pypa/cibuildwheel@v3.3.1
-      with:
-        package-dir: backend/mkl
-        config-file: backend/mkl/cibuildwheel.toml
-        output-dir: wheelhouse
-
-    - name: Upload artifacts to github
-      uses: actions/upload-artifact@v5
-      with:
-        name: wheels-mkl-${{ matrix.os }}
-        path: ./wheelhouse
diff --git a/.github/workflows/build_mkl_windows.yml b/.github/workflows/build_mkl_windows.yml
deleted file mode 100644
index f4bbe82f..00000000
--- a/.github/workflows/build_mkl_windows.yml
+++ /dev/null
@@ -1,62 +0,0 @@
-name: Build MKL Windows
-
-on:
-  push:
-    branches:
-      - master
-    tags:
-      - '*'
-  pull_request:
-    branches:
-      - master
-
-env:
-  # update urls for oneapi packages according to
-  # https://github.com/oneapi-src/oneapi-ci/blob/master/.github/workflows/build_all.yml
-  WINDOWS_BASEKIT_URL: https:/registrationcenter-download.intel.com/akdlm/IRC_NAS/c961e083-5685-4f0b-ada5-c6cf16f561dd/w_BaseKit_p_2023.1.0.47256_offline.exe
-  WINDOWS_BASEKIT_COMPONENTS: intel.oneapi.win.mkl.devel
-
-
-jobs:
-  build_wheels:
-    name: Build wheel on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    defaults:
-      run:
-        shell: cmd
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [windows-2022]
-
-    steps:
-    - uses: actions/checkout@master
-
-    - name: cache install oneapi
-      id: cache-install
-      uses: actions/cache@v4
-      with:
-        path: C:\Program Files (x86)\Intel\oneAPI\
-        key: install-${{ env.WINDOWS_BASEKIT_URL }}-${{ env.WINDOWS_BASEKIT_COMPONENTS }}
-
-    - name: install oneapi mkl
-      if: steps.cache-install.outputs.cache-hit != 'true'
-      run: |
-        curl.exe --output %TEMP%\webimage_base.exe --url %WINDOWS_BASEKIT_URL% --retry 5 --retry-delay 5
-        start /b /wait %TEMP%\webimage_base.exe -s -x -f webimage_base_extracted --log extract_base.log
-        del %TEMP%\webimage_base.exe
-        webimage_base_extracted\bootstrapper.exe -s --action install --components=%WINDOWS_BASEKIT_COMPONENTS% --eula=accept -p=NEED_VS2017_INTEGRATION=0 -p=NEED_VS2019_INTEGRATION=0 --log-dir=.
-        rd /s/q "webimage_base_extracted"
-
-    - name: Build wheels
-      uses: pypa/cibuildwheel@v3.3.1
-      with:
-        package-dir: backend/mkl
-        config-file: backend/mkl/cibuildwheel.toml
-        output-dir: wheelhouse
-
-    - name: Upload artifacts to github
-      uses: actions/upload-artifact@v5
-      with:
-        name: wheels-mkl-${{ matrix.os }}
-        path: ./wheelhouse
diff --git a/.github/workflows/build_wasm.yml b/.github/workflows/build_wasm.yml
deleted file mode 100644
index 7f516ff8..00000000
--- a/.github/workflows/build_wasm.yml
+++ /dev/null
@@ -1,33 +0,0 @@
-name: Build WASM
-
-on:
-  push:
-    branches:
-      - master
-    tags:
-      - '*'
-  pull_request:
-    branches:
-      - master
-
-jobs:
-  build_wheels:
-    name: Build wasm32 wheels
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@master
-
-    - name: Build wheels
-      uses: pypa/cibuildwheel@v3.3.1
-      env:
-        CIBW_PLATFORM: pyodide
-      with:
-        config-file: cibuildwheel.toml
-        output-dir: wheelhouse
-
-    - name: Upload artifacts to github
-      uses: actions/upload-artifact@v5
-      with:
-        name: wheels-wasm32
-        path: ./wheelhouse
diff --git a/.github/workflows/pre_commit.yml b/.github/workflows/pre_commit.yml
deleted file mode 100644
index 8d9a00df..00000000
--- a/.github/workflows/pre_commit.yml
+++ /dev/null
@@ -1,36 +0,0 @@
-name: Pre-commit checks
-
-on:
-  push:
-    # Run this workflow on all branches because it is good to flag these errors
-    # and this workflow is "cheap"
-    branches:
-      - '*'
-  pull_request:
-    branches:
-      - master
-
-jobs:
-  precommit:
-    name: Pre-commit checks
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest]
-
-    steps:
-    - uses: actions/checkout@master
-
-    - uses: actions/setup-python@v6
-      name: Install Python
-      with:
-        python-version: '3.9'
-
-    - name: Install package with dev dependencies
-      run: |
-        python -m pip install .[dev]
-
-    - name: Pre-commit checks
-      run: |
-        pre-commit run --all-files