And the reason why that doesn't and can't work with USB2 is because, unlike Ethernet, USB is extremely closely tied to its physical layer and you cannot actuall

And the reason why that doesn't and can't work with USB2 is because, unlike Ethernet, USB is extremely closely tied to its physical layer and you cannot actually buffer and switch USB packets at all (without cooperation from at least one side). All communications are host-driven and stateful, and the timeouts for replies are on the order of single-digit microseconds, and the receiving end has no obligation to accept data, so there is no way to safely buffer data and forward it at a later time because that time might never come, and the mere act of accepting data from one end desyncs both ends' ideas of what data was successfully transferred, which can have higher level protocol implications. USB is a clusterfuck of a standard.