> It's hugely about: cost, and the desire of the USB forum to ship a single "does everything" protocol that keeps a large chunk of the industry from choosing to stay on some old version of the spec forever.
why is it so bad if they stay on the old version? AFAIK, usb already bends over backwards to support every older version of the spec. imo, it would be great if USB3.x supported all the latest extensions, USB2 was still kinda fast, and USB1 could still be useful for that really old device you have sitting around (or if you just want to be able to trickle charge a phone with the only micro-usb you have around).
why is it so bad if they stay on the old version? AFAIK, usb already bends over backwards to support every older version of the spec. imo, it would be great if USB3.x supported all the latest extensions, USB2 was still kinda fast, and USB1 could still be useful for that really old device you have sitting around (or if you just want to be able to trickle charge a phone with the only micro-usb you have around).