I guess the question is whether any other Python implementation is threadless? E.g. is MicroPython? If it even has threads then I agree about deprecating the module.

But if MicroPython does support threads we should keep the module. That would mean updating all references of isAlive() to is_alive() and adding the name alias since that name aliasing still exists in 'master' right now (probably for Python 2 porting support): https://github.com/python/cpython/blob/3bb183d7fb83ad6a84ec13dea90f95d67be35c69/Lib/threading.py#L1094

@dmaurer totally understand about time restraints, but do realize even "trivial" fixes like this would still take at least an hour to do a proper job so there's no guarantee someone will get around to fixing this. But if you do change your mind and want to give it a try, then https://devguide.python.org/ is there to help.