Power delivery is the worst, but for a long time it was super random whether you'd get USB2 or USB3 speed, wait sorry USB3 High Speed or USB3 Full Speed or whatever they renamed it to. And then there's the confusion between USB 1/2/3/etc. and A/B/mini-A/mini-B/micro-A/micro-B/C connectors, and the fact that it requires a half-page infographic to just sum up the latter (
https://en.wikipedia.org/wiki/USB#Connector_type_quick_refer...). Overall I feel that the USB Working Group, wait the USB Promoter Group, wait- who even are they? should take a vow of penance and refer to themselves as the SB Group until they sort this out.