What editors don't do that? I'm only familiar with Emacs and Sublime which do. I'd hate to use an editor that didn't. Hopefully he added that functionality to Vy :)
In vim, j and k will only move the cursor between lines that exist, and the screen will follow the cursor. You can scroll the screen past the end of the file using ctrl+e and ctrl+y, but it's annoying.
Yes, I absolutely agree. I'm sure I've been guilty of it (I'd rid them if I noticed of course) but it's a pretty sloppy-looking project. Not holding my breath for it to replace vim.