Comment by nurbl

Though in principle they serve similar purposes there are some big differences though. Python with types is still just python. Typescript is a different language from JS (guess it a superset?) and it being controlled by a large company could be considered problematic.

I suppose JS could go in the same direction and adopt the typing syntax from TS as a non-runtime thing. Then the typescript compiler would become something like mypy, an entirely optional part of the ecosystem.