Apparently [1] PS/2 limited by a slower data rate than USB 2.0 which cancels out almost all the advantage of its lower initial latency to begin the transmission

Apparently [1] PS/2 limited by a slower data rate than USB 2.0 which cancels out almost all the advantage of its lower initial latency to begin the transmission, making them both about equally capable in actual latency - at least in theory. [1] https://youtu.be/wdgULBpRoXk?t=1953 https://youtu.be/wdgULBpRoXk?t=1953 Even if this conclusion is wrong, that video is a very pleasant and understandable explanation of the USB protocol.