I stopped for a while after hitting a wall 140 hours in, and there's still a silly amount of map left. I finally got to the capitol a few hours after that. It's crazy how big the world is.

Plenty of others have finished significantly faster if they wanted to, so it doesn't have to take that long. I'm not a completionist in terms of quests or collectibles or anything, but I do enjoy exploring every inch of the map, and have no need to rush. There's a lot of game there.