> That complicates everything. Is this a USB-C cable that can support PD 3.1? Who knows! Because, not all USB-C cables NEED to support PD 3.1, some of them just need to transmit data at USB 2.0 speeds. Those can be made super cheap.

Assuming you just mean the higher power levels, I'd say that's one of the most minimal issues. Every cable supports at least 60 watts, and you rarely need to consider it.