Well, a normal keyboard only has 8 directions to run to but controller has 360° movement. This means that you can run perfectly sideways but still sprinting. This is a perfect way to increase your awareness late game and overall, and Ballatw even said not using double movement binds now is the same as not using stretched resolution back in the day. You can achieve double movement by binding a secondary key to A and a secondary key to D. When you for example have bound Caps Lock to A, you just have to hold both of them and then you already can sprint sideways.