Depends on the use case. Erlang, Elixir, and Gleam are hosted on their own platform, and lots of use cases can be covered that way. Also, Flix is a thing, and

Depends on the use case. Erlang, Elixir, and Gleam are hosted on their own platform, and lots of use cases can be covered that way. Also, Flix is a thing, and some Scheme/CommonLisp/StandardML implementations compile to C. Ecosystem there. Purescript, Gleam and others compile to JS. Oh, and WebAssembly becomes valuable as compilation target as well. Also: Kotlin is almost a functional first language like F#