[d0mine]

It is not about your code, it is about C extensions you are relying on. Without GIL, you can't even be sure that refcounting works reliably. Bugs in C extensions are always possible. No GIL makes them more likely. Even if you are not the author of C extension, you have to debug the consequences.

[dudus]

Does that mean rewriting all the extensions to Rust? Or maybe CPython itself?

Would that be enough to make Python no gill viable?