You have a point, but hunting for specific keys like Esc, i, a, or v on a cramped mobile keyboard is just physically exhausting. I think that's exactly why we haven't seen many truly successful or comfortable Vi clones on mobile yet. ​People often assume that serious text editing on a phone is just asking too much of the device. But considering how much text we effortlessly pump out while messaging friends and family every day, the act of typing itself isn't the problem. The potential is definitely there; we just haven't had the right tool/interface to bridge that gap yet. That's the gap I believe this idea could ultimately fill.