Was that around the launch of Legion? I think cross realm zones only became a thing a year and a half ago. I find zones pretty much empty, but in going from 1-44 I’ve only been in… Durotar, northern STV and Feralas. That’s it. I’ve done every 5man between 15-44 once, those 3 zones, and I’m 44 now in less than 12 hours.
My /60 rogue from vanilla that only did 4 or 5 raids ever is at 30 days played, by way of comparison!