If mosquitos became extinct, would there be any disadvantages?
The idea that “the earth would recover pretty quickly” is just a bit overly optimistic. Mosquitos are a mainstay prey for numerous species, and given that many species are now restricted in both their range and their foodsources by how humans have changed the landscape, it is not certain that all those species would be able to reshuffle things to use a new food source. Austin, TX would almost certainly lose their bats, and the Midwest would very likely lose their swallows and house martins.