I really don't like such comments that like any nuance.
I know multiple companies that use Elm and many people depend on them for their livelihood.
I would not recommend it due because it has never been a really open source project and only the core maintainers were allowed to write libraries that interfaced with JS apis without the need of ports.
Still, it baffles me how many people would chime in and feel compelled to comment regardless of the fact that hundreds of projects out there make money with Elm.