That is not what I meant. I looked at sorted_set_nif which doesn't seem to compile on OTP 26 (we're at 27 now), and fastglobal which has a very old PR with 3 approvals has not been merged. Elixir libraries may not change _much_ but core libraries like telemetry, Ecto, ExDoc, Jason, still get either minor or patch releases all the time.

If libraries get regular updates even if they are minor, it indicates they are in use. If they have inactive repositories and low hex.pm download numbers, they may have been abandoned which can mean you have to maintain it yourself in the future, or the people behind the library found it's not such a good idea after all. This doesn't have to be the case, which is why I asked.