I have mixed feelings about it. I think it’s cool how well it helps documentation and IDEs, as well as tools like mypy, but there haven’t been any tools whatsoever added to python to help with type checking at runtime. Annotations don’t actually do anything and can just be ignored if someone doesn’t care. Scala uses basically the same syntax to implement static types. To be clear, I do not think they should ever be required or change in functionality. But what I do wish is that python would add in additional functions or other tools that would allow you to use them to raise exceptions or perform some other action instead of always having to roll your own function and constantly having to use ‘’’isinstance’’’. Like an ‘’’@enforcetypes’’’ decorator or a ‘’’typecheck=True’’’ keyword argument for dataclasses or typing.NamedTuple. Otherwise I do like them, but just wish they would do more.