We've already upstreamed a lot of changes, including one that makes all coroutines faster in Python 3.10. The big-ticket items in Cinder would be big changes for CPython and need discussion about whether CPython even wants them. You don't just slap a C++ JIT into a bugs.python.org ticket. Opening Cinder is the first step in the conversation, and we're here for that work too. It's not just "if you want it, take it."

Ok great to hear that this is the case!

Reading the README was a bit unclear on this topic.

I also know that engineers do their best, while their employers may not always care about proper behavior when it comes to contribute back to FLOSS