Elixir is like the alternate town in Blazing Saddles. It looks great but you find out there aren’t really people nor library depth there. After it blows up your staffing and project plans you end up moving back.
I built my startup in elixir. yes, there aren't as many libraries but the ones I've needed have been available and reasonably documented in most cases.
one thing I like in elixir is that the whole language (and thus libraries) are more composable. its easier forme to break and reform functionality from libraries in ways the authors didnt envision. Takes more time to integrate but the end result is way more maintainable.
Whilst I agree with you that Elixir is an also-ran Tiobe is the worst yardstick by which to measure a programming language. I can never understand why anyone takes it seriously.