this is super useful in non vim editors that support vim bindings, and the browser with vimium. The arrow keys are for where you get a dropdown list and don't want to touch your arrow keys. In Visual Studio where I use vim keybindings ( using VsVim ) a lot of refactorings / auto complete gives dropdown options and this gives an easy way to select them without leaving your homerow.
This is a bit older than my current bindings, but this does 3 useful bindings
https://github.com/keithn/vsvimguide/blob/master/vsvim.ah
CapsLock = Esc
Alt-J = Down Arrow
Alt-K = Up Arrow
this is super useful in non vim editors that support vim bindings, and the browser with vimium. The arrow keys are for where you get a dropdown list and don't want to touch your arrow keys. In Visual Studio where I use vim keybindings ( using VsVim ) a lot of refactorings / auto complete gives dropdown options and this gives an easy way to select them without leaving your homerow.