They were quite a bit behind the schedule that was promised five years ago.

Additionally, at this stage the severe political and governance problems cannot have escaped Microsoft. I imagine that no competent Microsoft employee wants to give his expertise to CPython, only later to suffer group defamation from a couple of elected mediocre people.

CPython is an organization that overpromises, allocates jobs to the obedient and faithful while weeding out competent dissenters.

It wasn't always like that. The issues are entirely self-inflicted.