Haskell and OCaml are definitely not just hobbies. I've used Haskell full-time for the last five years of my career. The company I work for uses Haskell for a

Haskell and OCaml are definitely not just hobbies. I've used Haskell full-time for the last five years of my career. The company I work for uses Haskell for a network packet parsing engine, web api servers, CLI executables, build infrastructure (alongside Nix and NixOS), an interpreter for a custom programming language, a gateway/proxy service for AWS services, etc.