...heh. You're awesome. Also, typing.Union[...] and typing.Optional[...] definitely are not deprecated. I'm so triggered! My jaw is tense and my forehead is crinkled. Recent releases of pyright inadvisably flagged both as deprecated, but... they're just not. In fact, they're actually dramatically superior to PEP 604-compliant |-delimited unions. Why?

Self-caching. typing.Union[...] and typing.Optional[...] self-cache. |-delimited unions don't. Even though their syntax is a bit clumsier, typing.Union[...] and typing.Optional[...] are thus dramatically superior to |-delimited unions. They reduce space consumption throughout the Python ecosystem. Type hints eat up a surprising amount of space, mostly uselessly. Reducing that by preferring self-caching to non-self-caching type hints is a huge win for everybody.

I actually ranted about this for five whole minutes on a Saturday evening on the pyright issue tracker. Naturally, my rant concludes with a Xena Warrior Princess meme. If only for the lols, I implore you to ingest my rant. 😆