I switched from Intellij to Atom when we switched from Ruby to Elixir because of the same constant freezing issues on osx. I found my computer just runs better without rubymine running. Maybe some of the differences people are seeing are due to Windows vs OSX versions?
Atom’s not perfect either - not having an Elixir formatter is an annoyance, and I can’t figure out how to select a string in my iex window, but on the whole it’s a much smoother experience.
It feels like this discussion has derailed a bit, perhaps the IDE discussion should be split into a new thread?
