Tried a Vector256 fallback. Not maximally optimized; includes extra shuffles. Around 60% slower than the AVX dedicated codepath as is. Going to revisit once I have an actual arm device to test.
Tried a Vector256 fallback. Not maximally optimized; includes extra shuffles. Around 60% slower than the AVX dedicated codepath as is. Going to revisit once I have an actual arm device to test.

bepu/bepuphysics2,bepu/bepuphysics2