It's no secret that most USB hubs have 4-layer PCBs. However, making 4-layer PCBs would have easily quadrupled the cost per PCB and increased development time over a 2-layer design. So what would happen if someone tried to make a 2-layer hub?

sigh



So..... here's my research (and writeup) for how I overcame this issue:
https://www.reddit.com/r/electronics/comments/c365zm/a_quick_guide_to_highspeed_usb/

With that, on to version 2!