There's a lot to love about Elm, and I've written quite a bit of production code with it starting around 0.18.0. But in 2026 I'm not sure why a company would newly choose a language that hasn't otherwise been updated in nearly 7 years.
It's a little tricky though, because the comment you were replying to was talking about the lack of updates. And in that sense, Elm is now very stable - no breaking changes (or any changes at all!) in seven years and counting.
(Although, for all the complaints about the React ecosystem: you can still write class-style React components, even though they were effectively deprecated when hooks were introduced just over seven years ago.)
OTOH, we have this blog post suggesting development on Elm is kicking up again. Which means more breaking changes might be incoming.