PHP has had a lot of conventions so the training data is all over the place. Ruby is a nightmare in that regard. Can't speak to Elixir but I'm surprised to hear someone say LLMs producing good code in either language.

On the other hand, Go code from 2012 and Go code from 2026 looks virtually the same. Conventions are respected, go fmt is the one single formatter, "use the stdlib" is a popular mantra and the code is readable by design.

If I were to codegen a project I wouldn't use anything but Go at this point.