I encourage every one to at least stop writing code in Python.
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Use a type checker! Pyright can get you like 80% of Rust's type safety.
Nobody would claim that. But are you trying to say that the language has no effect on reliability? Because that's obviously nonsense.
Language choice has some effect on reliability, and I would say Python's effect is mediocre-to-bad. Depending on if you use Pyright. Not too bad if you do. Pretty awful if you don't.