Re: why isn't USB 3 more widely used?
Right now its the price. currently USB 2.0 ports cost about 10 cents per port and USB 3.0 ports cost about one dollar per port so as the price drops they will slowly be implementing it more. Just like thunderbolt ports which u can mostly only find in apple macbook's they range at about $10 per port so you almost never see them in use.
CPU - I7 2600K 4.5 GHZ
RAM - 8 GB DDR3 1600mhz
GPU - GTX 570 Classified