I wasn’t talking about nerfing C-extensions. You can get the same power out of a smaller, well-defined interface that would give the interpreter a lot more leeway for optimization. This optimizations would therefore make native Python packages more feasible, making the ecosystem less dependent on C extensions. Anyway, I don’t think people use Python because of the C-extensions packages (although there are certainly some exceptions e.g., pandas), I think people use C extensions because the native performance is so poor.