On par with raids, dungeons, solo challenge modes (Torghast and brawlers guild) and PvP.
With legion I was able to level up alts to max through a variety of content, and it was actually enjoyable as a result. Not sure whether I should bother level up alts in SL anymore considering the current state of things. Thinking of unsubbing and checking out ESO Blackwood while waiting for NW and resub when I can level up in Torghast and in a new endless grinding end game zone.