You may have a very justified reason to switch, including nnot liking one aspect of emacs. But you are presenting it as a general flaw. Which people cannot obviously accept as it’s fine for them and they are not experiencing your issue (and as you know, everyone’s setup and workflow are different)

As for the single threaded nature of it, it doesn’t bother me. Because what should be async already is. The only thing left that is synchronous follows closely the repl model of the terminal. I issue a command and I wait for the result. If the result doesn’t matter or I want part of it as soon as possible, then it can be async and there’s plenty of way you can make it so.