The downside is that static typing makes your programs much more rigid. Even if you program to interfaces, apply open-closed principle etc. After a while you st

The downside is that static typing makes your programs much more rigid. Even if you program to interfaces, apply open-closed principle etc. After a while you start fighting the type system. That's why I like dynamic typing. Coupled with Python's type annotations for hard cases and good documentation, dynamic typing allows you to go further by reducing cognitive load.