[scottmessinger]

FWIW, I've been using Elixir in production since 2016 and haven't found I've needed to learn any erlang. For context, we use Elixir for our backend and serve around ~100/rps over websockets. We've integrated Elixir into Stripe, Segment, Google, and Xero and haven't found we've needed Erlang libraries for any of those integrations or any of the other parts of our code base.

> Elixir when they invariably stumble across the things in erlang — libraries and the like. I'd hoped I could avoid it myself, but it's too interdependent.

This hasn't been true in my experience. I'd be curious to hear which Erlang libraries the OP has been using.

[ch4s3]

If nothing else you're likely to run into ETS, it's really nice and easy to use. But even still, the calls are pretty easy to make, and the docs are good. You don't really even need to understand any Erlang syntax, it's just built into OTP.