But what do people actually use Python for the most, at least as far as industry is concerned? Interfacing with those C extensions.
PyPy does have an alternative ABI that integrates with the JIT and also works on CPython, so if people cared that much about those remaining bits of performance, they could support it.
That is the sad part of it all.
The culture that sees writing C as Python, and for them to care, Microsoft and Facebook had to step in.
Now with Microsoft out of the loop, lets see how much support the whole CPython JIT project will keep getting.