Quite a stretch and not exactly a standardization issue (more like if something useful is implemented/supported or not), but lack of DisplayPort MST in MacBooks had upset some folks.

More on point - the speculation about real fast charging requiring Apple-blessed circuitry is - AFAIK - still neither proven nor refuted.

I’ve got a number of USB storage devices that work on my intel macs but none of my silicon macs. One was a brand associated with mac.

That could be because the devices themselves are not spec and the intel macs are more tolerant, but as a customer the result is the same: shit don’t work on m1.