There's a bunch of weirdness. Lack of USB2 to USB3 translation is one of them, but there's also a lack of USB3 and USB2 concurrency. E.g., if I put a USB 2 dev

There's a bunch of weirdness. Lack of USB2 to USB3 translation is one of them, but there's also a lack of USB3 and USB2 concurrency. E.g., if I put a USB 2 device on a bus with a USB 3 flash drive I would find constant stalling due to the USB2 bus activity. It even went so far that the output of `lsusb -t` would show the speed downgraded to 480Mbps at the bus level and not just the port. This has since been changed, but I notice stalling and bad performance. This is supposed to be fixed in USB3.1 and 3.2 but I am not sure we're going to see it in practice. The original spec does not say they are supposed to happen at the same time but the spec authors have made themselves clear that they were supposed to operate concurrently.