This is the problem I have with Erlang developers. They only want to work on Erlang. Pragmatism be damned. It is never about the product or the company. It is only about which of the remaining 20 Erlang expert personalities in the world do they get to work alongside with. If there needs to be a special library, all other existing ones are garbage unless written by one of the 20 above, so they will just write their ow…
I'm not going to reach for libraries in Erlang, because mostly I've seen them not be there, and a lot of stuff is almost the same amount of code and fuss to use a library as to build the portion of the library that's actually needed in the moment. Any code that you bring in is code that you're running and responsible for, so it's got to be worth it. I've pulled in libraries that needed a lot of rewriting, and sometimes that's better than starting from scratch, and sometimes it's not. There's a fair amount of stuff out there where someone scratched their itch and left it as is; which is fine and thank you, but it might need a lot of help to be run in a production capacity.
I'm working a new job now and there's probably no Erlang in it. Which is sad, but I'll deal. That said, if I was working in Erlang and management said we had to switch, I would be out. It's one thing to work without the benefits of Erlang, it's another to be working with them and then have it taken away.