Author here. If Erlang's community is small, Elixir has an even smaller community. Elixir did just recently rise to the #56 most popular language on Github[1] from #57 however, so it's on the rise.
In five months of working with Elixir, I can only think of one issue I've had that's related to importing Erlang records with functions as a default value. Even then, the issue is being thought about[1] and there's already several workarounds. Issues are resolved quickly and Elixir releases happen often.
[1]: https://github.com/languages/Elixir