Haskell checks all those boxes, plus it’s been around for 28 years. Yes, I am a fanboy. That said, it’s a hard language to learn. Seems like there’s a mass mig

Haskell checks all those boxes, plus it’s been around for 28 years. Yes, I am a fanboy. That said, it’s a hard language to learn. Seems like there’s a mass migration away from Ruby for performance reasons, with people flocking to languages with familiar syntax, e.g., Elixir, Crystal, even though there are very different language semantics.