The 24.6 MP Sigma BF adopts the goal of stripping away all that is superfluous to photography while still providing access to the latest features, including hybrid autofocus and 6K video.https://www.notebookcheck.net/Sigma-BF-full-frame-camera-launches-with-a-minimalistic-design.966636.0.html
Not the first camera from a single block of aluminium, Leica already did that.
@jakubs you're most certainly right - thanks for spotting the issue!