Best example actually would be WoW, they started off badly, frequent server crashes for the first few months, very little content, a lot of other bugs(which do still pop up from time to time), but yet, look at it now, it's the juggernaut of the MMO world.
AOC has gotten a lot better true, but it's lacking in many ways and it's appeal is fairly limited.
AOC has gotten a lot better true, but it's lacking in many ways and it's appeal is fairly limited.