One text editor I have always wanted is a word processor with first class vim keybindings support. I don't need too many fanciful features but the most important features would be proper text reflowing and vim integration. Vim doesn't do too well with reflowing text when a hard margin is set, nor when there a single digital line is stretched across several visual lines. Vim by default would treat it as a single digital line and it makes navigating really difficult as cursors would jump across the screen.