Originally Posted by
Viridiana
Yes, we'd have picked somewhere to congregate, and we'd have set up almost all our retainers there, no matter what. Why did we pick Uldah? Because after spending 20 anima warping around to do a quest, spending 3 more to get to another city doesn't sound appealing, especially when you know this is gonna happen again in a few levels. Heck, some people stay so low on anima that they can't teleport somewhere else, and running sounds even less fun.
Also, you misunderstood Martyr's comment, I believe. He was saying that the retainers are lifeless and just stand there for hours on end doing nothing but impersonating zombies.
As an aside, WoW still does the natural congregation trick, but it's not based on trade. The trade in all their capital cities are linked, via both AH and /trade channel. Biggest reason people still gather together in the same city is for partying, I'd say.