> However, I like to use Python for small single-purpose utilities, and in those cases I don't even bother with the optional type annotations, let alone checkin

> However, I like to use Python for small single-purpose utilities, and in those cases I don't even bother with the optional type annotations, let alone checking them with mypy. I agree for small utilities and code that's acting as glue between layers that it's convenient to have languages that are loose with what they accept because you can usually manually and exhaustively QA them and because you have no other choice when connecting languages without static type systems. Once you have a large and complex app though, strong typing makes you so much more productive that I honestly can't understand how anyone could argue against strong types.