[marcosdumay]

It's a 3A supply up to the 100W one, that gets upped to 5A at higher voltages.

Varying voltage power supplies are usually capped by current, not power. That's because many of the components, set maximum current and voltage that you must obey independently.

At higher voltages people start accepting higher loses in stuff like cables, because fire-safety becomes a more important concern than efficiency. So the standard relaxes things a little bit.

[eqvinox]

You're correct but it's irrelevant. My point was that these requirements are in the standard and if you want to put the USB logo on a power brick you need to meet them. And the consumer is intended to be able to rely on them - which was & still is a pretty good idea considering the USB-C cable carnage.

I wish they did something like this for USB-C cables, but it's probably too late.