alt Hacker News> which will warn you with all the locations you’ll need to edit
This is true, but with a program built with a dynamic language, taking advantage of the fact that it's written in a dynamic language, doesn't need to make those changes at all.
I'm fan of static typing in many situations, but it's hard to deny it doesn't lead to more changes as you need to properly propagate changes.
I don't find that dynamic typing reduces the number of places I need to update stuff. It just changes when the error occurs.
If I change the shape of some data (such as renaming object properties), I'll need to update all the code that used that data, regardless of the type system. Static typing just ensures that I catch those cases at compile time, not runtime.