I was running both for a while, but recently turned off vscode-elixir and I haven’t noticed that I’m missing anything, or that any conflict was causing problems. ElixirLS is nice, and pretty active development (yesterday autospec feature was added and it’s pretty cool). I’m pretty much an oldschool vim user, but elixirls goto-definition has been something I use every hour. My only peeve at the moment is that #find-symbol-in-workspace seems to to work, where as find-symbol-in-file works fine.