Finished EVERY MAP without mounts. Ask me anything.
So the title is pretty much just that, I wondered if i could do the entire map completion without mounts, the answer is yes BUT. I'll answer some very commonplace questions in the body first, then after reading those you can ask another question.
Worst maps to complete was Mistburned Barrens. It has 2 very tall vista that both have the fake updrafts that can't be used with gliding to get to. Auric Basin (meta locked areas that aren't often done nowadays), Starlit Weald (popular for now, but still meta locked locations), and there were a few others where areas were locked behind metas.
Jade bot gliding booster level 3 was pretty much mandatory once i got to Desert Highlands.
Favorite maps to complete without mounts were Lowland shore, oddly Inner Nayos (though there was some puzzling there), and Caledon Forest.
You do need a friend with a raptor for a single heart in new kaineng, they smash the anti-stealth turrets with raptor swipe, and you kill the adds that spawn from their attack. Those were the only adds that counted for heart progress in the entire area. (I would also have liked the event that happens there to have counted, and stray adds around the area as well, but beggars can't be choosers.)
Said friend also needs to have done the entirety of the SoTo story to access the final 2 poi's.
No, I won't be doing it again, however I WILL continue this legacy with future releases until I absolutely can't do a map without a mount.
With that all said, ask away.