I believe yes (for a few years now) , based on its appearance in almost every mainstream language (js has a whole FP paradigm some swear on, java, c#, etc). I

I believe yes (for a few years now) , based on its appearance in almost every mainstream language (js has a whole FP paradigm some swear on, java, c#, etc). I think it is hard to find an exact reason, big languages introducing them both cause people to become familiar with FP and more people knowing FP will make languages better implement its features. It simply just got ready for prime time after several decades of lingering in academics - probably the hype of reactive frameworks added to it a bit as it made many people experience the pain-ease of managing frontend state before and after the paradigm shift.