As someone who just had to backport a fairly large script to support 3.6, I found myself surprised at how much had changed. Dataclasses? Nope. `__future__.annotations`? Nope. `namedtuple.defaults`? Nope.

It's also been frustrating with the lack of tooling support. I mean, I get it – it's hideously EOL'd – but I can't use Poetry, uv, pytest... at least it still has type hints.