I agree that static typing helps reading comprehension and that IDEs like pycharm help getting into big code bases, that said, at the end of the day, when you know the code both the IDE and static typing are getting in the way. Actually, I never saw anybody as quick as people using simple editors like emacs and vim. GUI is getting in the way of the programmers intent. Static typing is a hindrance in front of refactoring. Unit tests is the only truth that matters, static typing or not.