I have to shy away from using these remappings because I often work in Vim-emulation mode. It's easier to map CapsLock to ESC system-wide. It works across the several Vim-emulating editors I use.

I use quite a few as well and they all support it. Actually I don’t use vim much, mostly emacs and vscode but I know it works in IntelliJ, Eclipse and Visual Studio as well. What is annoying though is they all have totally different names and methods of configuration.

Consciously I know that jk is a better shortcut, but I've been using jj for so long that it's ingrained in the muscle memory, when I started using emacs the first thing that I did with evil was replicate all the shortcuts that I am used to in vim, the first one was jj.

Hah that’s good one! I need to take a vacation and re-examine my vim life. So many good things to explore and muscle memory to tweak.

I wonder if there are any studies that look at how hard it is to permanently readjust muscle memory as you age.

Would I ever (at 31) ever achieve the same fluency with emacs if I switched cold-turkey today as I've developed with vim in my teens and twenties? What about in my fifties?

I'm 33, switched to emacs the end of the last year, still find the way that vim edit files better, but the ecosystem around emacs has a ton of niceties, so for me the solution was to install evil-mode and configure it to work as close as possible to my vim configuration, but in the end I decided to left some things the emacs way.

Now I sometimes find myself using some of the emacs shortcuts when editing files with vim...

Nah when you hit 50 you're basically just a burned out husk and can't learn anything new, not even your muscles.

Love, Silicon Valley

This is what Spacemacs and I think Evil Mode do as well