My top-level character started Ultimate at lvl 92, and very close to 93. This was also the first character I beat the expac with. Obviously, leveling slows way down in Elite and Ultimate. It’s meant to be that way. On the higher difficulties, you are refining your skills, exploiting upper-tier devotions, and finding gear that helps your build. Which is what keeps it replayable at those levels, imo.
I’m neither a casual ‘play-through and move on’ player nor a crucible gladiator. I try to keep both in mind when I post anything here. Most of the active members on this board are in the latter camp. As Zantai said, the game is designed for people in the former camp…