Programmers generally pick platforms and not languages. C became popular because of Unix and then Windows. JavaScript came with the browser. PHP came with sh

Programmers generally pick platforms and not languages. C became popular because of Unix and then Windows. JavaScript came with the browser. PHP came with shared hosting. Go sort of came with the "cloud". Java was made by an OS company, and it got new life with Android. So did Kotlin. Swift is for iOS, etc. There are exceptions like Python and Ruby, but I think the "default" is that a given language is not popular, and there have been almost no platforms written in functional languages. (anticipating the objection: Lisp isn't functional :) )