It’s hardly JS developers who think functional programming is cool. Scala became huge in the JVM world because of its functional nature. Kotlin includes a lot of functional programming, and Java itself continues to add functional capabilities.

And if you look at the .Net side of things, C# has basically been on a path to look increasingly like F# with every release. And of course, LINQ, one of C#’s most popular features, is little more than a functional subset of C#.

Arguably its backend developers moving to the front end who have been trying to bring functional concepts to front end programming.