My problem with object-verb is that it requires much more keymaps for motions (you need to distinguish between “move selection” and “extend selection”).
Though it's not that it should be the only way to go (plenty of vim pros have adjusted), it's just visual feedback is very powerful, and lack thereof is a legitimate big challenge you shouldn't ignore in the "greatest" answer
This would kinda be the opposite of the idea in Helix/Kakoune: one automatically enters a visual-mode-like state after typing a verb that expects an object.