Elder Scrolls Online is a horrible example of what the OPa recommends.
If any of your friends, caught up on the story line, keeps playing one hour alone they will "phase out" on quests and will not be able to continue playing with the friends group…
I loved the content of TESO the story line is awesome and it feels Scrolls enough for me. Reason I left? MMO basics. You can't complete content together with friends if they have already done the content; they join you but they phase out of synch. S…