So glad they are doing this and it’s just the start from what I understand. We also may have actual concurrency in python soon.
Can you elaborate on what you mean by "actual concurrency in python soon"?
There was an experimental branch where someone reimplemented Python 3.9 sans the Gil and managed to maintain performance parity with the Gil’ed version. It’s likely this performance uplift is through the various optimisations that PR implemented.
The majority of the improvements come from the Faster-CPython (https://github.com/faster-cpython/ideas) project, sponsored by Microsoft (Thanks!!)