Originally Posted by Crayon Puppet
he has low range which for an ad carry late game is typically bad, but he has extremely high incombat mobility compared to other ad carries and a monster as steroid so he fairs really well in late game
His in-combat mobility is pretty bad for an AD Carry. His dash does not go far at all, and he needs to use it for his AS steroid. It only has a good cooldown if he keeps attacking, which can be problematic if you are getting AS Shredded or need to GTFO without attacking.
Compare that to Tristana, with her long jump and knock-back to stay safe, Corki, with his massive dash and great ability to stay in a fight with his rockets, Vayne, who's dash comes with stealth and is on a two-second cooldown, or even Sivir, with her +50 ms passive and 20% MS ultimate.