This looks really nice! It feels like in the last few years (probably with the increase in data science and analytics) dataframe engines have become really exciting, its very cool to see so much innovation in the field.

One thing i haven't seen yet and I'd be really interested in knowing if column level type hinting is on the plan at all for this (or any similar tools)?

I'm a data engineer and my team use mypy pretty heavily, but that can only really tell us if something is a "dataframe" type. It always strikes me that 90% of data issues during development (incorrect joins, column misspellings or non-type appropriate operations, not factoring in nulls) would be eliminated if mypy had information of the columns and their data types.