I like that it is pure, typed, and functional. There’s also something that I heard/read before and remembered I was nodding to it (but couldn’t find it).
With Elm, I could take a sure-footed approach to problems that I might have previously felt is too hard for me. My Elm solution to each small part cumulates to the final solution without requiring me to keep revisiting at every step (because it’s “proven”). And the best part is, after I’ve crossed the finishing line & gotten everything working, tidying up my entire solution is a safe and mechanical process. Confidence++