Heck, even EverQuest 2 is still out there trucking along, and releasing its 18th expansion in December. To put that into perspective, World of Warcraft has had eight expansions in 17 years, which isn’t even an expansion every two years. In that time, it’s managed a scorching pace on expansions - 28 expansions in 21 years is 1.3 expansions a year. It’s survived the death of one of its visionaries, the aforementioned corporate restructuring, and other MMO’s coming along and eclipsing it in the public eye, and it’s kept on putting out content year after year, expansion after expansion, for 21 years and counting.
It’s changed hands from Sony to Daybreak Games, which then restructured and put Darkpaw Games in charge of the MMO.
EverQuest, the MMO that launched in 1999 and was for several years the biggest MMO in the world, is still kicking. Terror of Luclin, the 28th expansion for EverQuest, is coming out in December.