> I've seen very many C++ or Java programmers think they can handle JS just fine. It's never too long before those functional concepts they considered useless (or even worse, were never taught) begin to haunt them.

And nowadays they cannot runaway as functional programming concepts begin to infect their languages as well.

They are left with:

- stay in the past, hoping to retire before being forced into newer versions of their languages

- learn and embrace FP and get to discover how OOP and FP can work together

- try to jump to other languages that are still friendly to old school developers