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    I think the key difference will be in data transfers (EG USB harddrives) rather than input devices. I'd write an answer but I think someone else would have the free time necessary to fully develop an in-depth answer. Commented Nov 20, 2019 at 20:11
  • before PS/2 mice became popular, the serial port was used for pointing devices and that's far slower than USB 1.1, yet no one complained about responsiveness Commented Nov 21, 2019 at 15:33
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    @phuclv, To be fair, there were no games fast enough to cause anyone to worry about input lag. Commented Nov 21, 2019 at 18:44
  • @JPhi1618 correct, but even if the games were much faster, people won't notice the difference between 100Hz and 200Hz Commented Nov 22, 2019 at 1:42
  • I have never seen a USB3 mouse or keyboard. It's important to be aware that while USB3 is backwards compatible, you are not getting any speed benefit by connecting non USB3 device in it. Commented Nov 22, 2019 at 11:07