> faster-cpython project

Seems to have died the same death as Unladen Swallow, Pyston, etc:

https://discuss.python.org/t/community-stewardship-of-faster...

I'm the author of the thread you linked. Community stewardship is actually happening in some form or another now.

3.15 has some JIT upgrades that are in-progress. This has a non-exhaustive list of them https://docs.python.org/dev/whatsnew/3.15.html#upgraded-jit-...