Earlier quoted context omitted.
MyPy doesn't require everything to be type-hinted. It's fine to sprinkle in hints where you want them.
when people using your library need pylance type hinting to show up for all your public methods, and those public methods are in fact generated as proxies for some other object. This was trivial as a dynamic runtime thing before, now must be statically generated. I can share examples if you'd like.
So the only problem is type hinting in IDEs. That's a small price to pay.