Personally I don't see performance as a major issue, though some things can be a bit annoying. But note that the concurrency problem has been recognized by the

Personally I don't see performance as a major issue, though some things can be a bit annoying. But note that the concurrency problem has been recognized by the devs and a recent version of Emacs introduced some kind of threads. So I think we can expext progress in the next coming years.