My professional Elm experience is as follows:

* 2017 - 2019

* 2021 - 2023

* 2023 - ?? (I'm starting a new job next month with Elm)

In my experience Elm isn't dead. But it is good enough. The lack of rapid changes, updates, etc are a feature, not a bug. I hated working in React TypeScript and what felt like constant updates to major libraries, including React and TS themselves.