The solution, I believe, is rather simple. The standards group should require any cable/device with USB 3 support to include a label on its packaging detailing which capabilities of USB 3 are supported. Think of the nutrition labels on food packaging, instead showing what the device does and does not support, something like this: Power Delivery——–30w max Thunderbolt————No support Bandwidth————–800Mbps max Video——————…
Deciding what is a must have is the more tricky part. I personally think power is a must have. I think every charger and every cable should be able to charge every device. I think having a USB C charger, cable, and device, that it should not even be possible to plug it in and have it not charge because one of those three things does not support the other two.