I agree with this so much! I recently started using patito, which is a typesafe pydantic based library for Polars. I’m not really deep into it yet, but I prefer polars syntax and the extra functions that Patito adds to the dataframes. (https://patito.readthedocs.io/en/latest/)

Otherwise, it feels so broken to just pass a dataframe around. It’s like typing everything as a “dict” and hoping for the best. It’s awful.