Every conforming cable supports 3 amps and 20 volts.
If you think something's incorrect with that, be specific. But the spec is pretty clear.
The exact details of the faster cables are murky because there's old and new versions of that section of the spec, but very few devices use enough power to care about that.
The problem is all the non-conforming cables that people have, that look exactly the same as conforming cables.
Is the part of the GP comment I was responding to. The connectors form part of the standard. There’s no way to identify a standards-conforming cable from a non-standards-conforming cable by looking at it. They all look the same.
You plug in a USB-C cable, you might get a quick charge. You might not. Unless you have a USB-C power meter, you have no way to tell unless you know how quickly your device should charge in 5, 10 or 15 minutes, and hang around to wait and see if it does or not.
I think there’s a meaningful difference there!
Really, we're talking about physically broken cables here. As long as there's electrical connection, there's no other way for a cable to not work at 3A/60W with USB PD. Its cable requirements only start when you want to go higher than that - and 60W is plenty of power already.
If something breaks that, it doesn't make sense to blame USB. Whatever the manufacturer was doing, it was such a mess that it would fail with any other standard.
Supporting data and PD is just three tiny wires, it's not hard.