One of the reasons USB-PD has active power negotiation is because of all the terrible $1-to-make chargers that flood phone stores and degrade your battery capac

One of the reasons USB-PD has active power negotiation is because of all the terrible $1-to-make chargers that flood phone stores and degrade your battery capacity over time. The kind that either: (A) charges your battery in pulses, (B) tries to force-send more current than the phone can handle for "faster charging", or (C) improperly protects the connected device from power grid spikes. USB-PD then makes power negotiation a protocol rather than a dance of resistors, forces the device to have a dedicated charging circuit (regulate current), and allows for a device to say "please send less power now" or shut off charging if it overheats. Manufacturers change the ports and occasionally you have a Nintendo that wants to reuse a port with their own mini-spec, but most of the blame lies with those outright malicious chargers.