Originally Posted by
AFK-Champion
Mobility can be compared between characters.
Take for example complete sitting duck like Lux/Brand, you'll only need to cast about 5 spells to gain bladesurge worth advantage over them. And this is not racing game. If you can knockback and stun the melee who gap closed you, then you can kite them much better than when all you have is limited dash, not even talking about how vastly superior it is vs other range that don't have this advantage.
And one tip, there is an item that somewhat counters effects of gap closers, and is incredibly efficient on this kind of characters, costing you just 2600 gold.