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Here are some possible reasons. They use unmaintained C extensions that won't be updated. They maintain C extensions that would be complex or painful to updat

Here are some possible reasons. They use unmaintained C extensions that won't be updated. They maintain C extensions that would be complex or painful to update. They're concerned about fragmenting the ecosystem into GIL and No GIL. They think that it will make single-threaded Python programs slower. They have no interest in multithreaded Python and don't think the additional complexity is justified.

wheelerof4te 3y ago
> They use unmaintained C extensions that won't be updated. Well, that's on them. > They're concerned about fragmenting the ecosystem into GIL and No GIL. Same way we have fragmentated ecosystem into ASYNC vs SYNC now? /s > They think that it will make single-threaded Python programs slower. Python is already horribly slow. A little bit slower single thread programs shouldn't be a problem. But the inability to run multi-threaded programs effectively in this day and age is very much a problem.