Not exactly page-, but post-/comment-level: I've fumble-fingered away responses on various online platforms on my phone a few times, so I've had to start over from the beginning. And a few times, ordinary dumb AutoCarrot on my phone has apparently recognised "He's trying to say the same thing again" and offered up the next word -- all of them, in order; the next one after the one I just accepted, all the way through to the end -- from the screed I'd failed to post just before.

Far from "intelligence", but nice and handy. Too bad it only happens so rarely, not onsistently.