It's kind of crazy to witness.

Rails is very insular tech.

A lot of people bet their entire careers on Rails. I've worked on Rails shops, and the majority of developers have not touched another language in years. There are people who never shipped anything in anything but Rails, and haven't done anything in other language since college, or ever if they did a bootcamp.

I have even interviewed a significant number of people doing Rails for ten years who did not know it was possible to launch a Ruby application with `ruby script.rb`.

Not to mention that with the emergence of frontend frameworks, most Rails developers were doing API-only stuff, and barely interacted with the frontend.

I recently left a company that was moving to from Rails to Go (might have been partially my fault), and there were was a bit of a mutiny where several teams have refused to change languages.

DHH is pretty much saying AI is gonna eat this people alive.