Given that C++, Java, C#, VB.NET, JavaScript now have functional programming. features, and Smalltalk always had LINQ like capabilities, there is plenty of software written in functional like languages.

And then there is the whole lot of Scala, Kotlin, Swift, TypeScript, before we even delve that Haskell and OCaml are used by Jane Street, Intel, Microsoft and Facebook, just to throw a couple of names around.

Don't worry, you can use C and Go instead.