The freemium model of everything makes me skeptical and reluctant to buy too much into many things.

Bit like Pydantic. It's a JSON parsing library at the end of the day, and now suddenly that's got a corporate backer and they've built a new thing

Polars is similar. It's a faster Pandas and now suddenly it's no longer the same prospect.

FastAPI the same. That one I find even more egregious since it's effectively Starlette + Pydantic.

Edit: Add Plotly/Dash, SQLAlchemy, Streamlit to that list.