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My “early-ish” adopter experience with Python 3.14 is…a mixture of profound disappointment and frustration. Lots of stuff is just *broken* with little to no actionable solution.

The annotation changes break non-Pydantic libraries like msgspec, sub interpreters are cool in theory but have massive incompatibility issues with everything from numpy to Pydantic, there’s notable and unexplained 10-20% performance drops across the board.