This MMO single-handedly destroyed the genre, turning the industry from a sandbox experience (as seen in Ultima Online, Everquest and Eve Online) to basically a giant online theme park with shallow mechanics. But due to it's extremely low barrier entry, simple gameplay, child-like graphics "WoW glow" and faux complexity the game gained a lot of support in the lower socio-economic cohorts of society. This in turn nullified all prospects of unique or sandbox-based MMOs in favor for WoW-like clones, relying more on theme-park gimmicks.