There's a lot to like about Elm, but the tradeoff is that the BDFL (Evan) has essentially abandoned public work on it [0, 1], and the community seems to be shrinking [2].

I personally wouldn't choose it for new projects, and I consider it essentially a brilliant research language (it's inspired a LOT of other UI work).

0: https://elmcraft.org/lore/elm-core-development/

1: https://podcasts.apple.com/us/podcast/elm-the-future-of-open...

2: https://reasonableapproximation.net/2024/11/02/elm-community...

If I needed to build a Single Page Application, personally, Elm is the only tech I would use.