Regarding the 2023 part, it's because dataclasses in Python are pretty fully-featured and part of the stdlib, so building rich data structures is quick, ergonom

Regarding the 2023 part, it's because dataclasses in Python are pretty fully-featured and part of the stdlib, so building rich data structures is quick, ergonomic, and helps remove/centralize boilerplate and parsing (aka validating, see https://lexi-lambda.github.io/blog/2019/11/05/parse-don-t-validate/ https://lexi-lambda.github.io/blog/2019/11/05/parse-don-t-va...). Regarding rude, yea it was a bit tongue-in-cheek (I would never hold a grudge against somebody for returning a dict). You should generally define an interface for your function that's as precise as its logic allows for. `Dict` is as good as `Any`: it doesn't tell you very much about what the function internally expects. The sibling comment to mine does a good job going through this.