Strange, I love GNU screen, and find the key combinations very easy and intuitive. However, I could never seem to master GNU's Emacs and what I find are very strange default key commands. I love vim for the reason of, what I personally find, very intuitive key combinations.

I just downloaded VSCode for the first time recently -- which I was delighted to find has a VIM mode. From what I read VSCode's VIM mode does not respect the undo tree of actual VIM.