Flight is one of those movement tricks that a lot of MMOs use because let’s be honest, flying is awesome. We are naturally land-bound mammals, and that means we are fascinated by flying and see it as the ultimate freedom, since basically everything we deal with is limited by our need to navigate it without flying. So it’s a big deal when an MMO lets you tell gravity to take a flying leap by jumping on the back of a flying mount, or by being a superhero who can fly, or having a wuxia game where your character can just fly around for no real reason beyond it looking cool.
This does not, however, mean that flight is a net benefit in every game where it shows up. Sometimes games are really not designed around flight and it makes navigation boring, or it trivializes map design, or otherwise makes things just less fun all around. So which MMO with flight would be better without it? Even though no one would want flight taken away, where would it make the game probably better overall?