Another way to phrase this is that in old languages, static types were added for the compiler, while in modern languages they are added for the developers (spec

Another way to phrase this is that in old languages, static types were added for the compiler, while in modern languages they are added for the developers (specifically, the teammates of the developer). This is why hybrid typing is so prevalent nowadays, as you don’t need to satisfy any internal need of the compiler, but you can still keep the documentation of models and interfaces that static typing gives, where desired. Performance is usually also a no-factor nowadays unless you have high demands. On top of this, the only reason JavaScript grew so large was that there was literally no other way to ship code to a user. IE6 was the universe. Nobody wrote code like this by choice. And those unfortunate souls that did still have scars from it. Remember this was also before CI checking every PR for correctness became as common as it is today. Because of all this, there will not be any “swing of the pendulum” back to the crazy era of untyped PHP, JavaScript without TS or python without mypy. This is something that is here to stay.