@Arwen thanks for the Wiki update. Actually yes, 3A is quite high amperage for 5V, because high amperage generate lots of heat. Voltage drops along a lengthy cable can be more than noticeable, for example going from 5.3v to 4.6v if the cable is 1.5~3m and the copper section is not high. That's why laptops with PD only allow as a general rule 20v@3A, to reach maximum specs of 100W@20v@5A you need certified cables so there isn't any USB disconnect or self-ignition fire hazard. And GaN chargers are preferred due to more compact size.
For next PineBook Phone/laptop generations I strongly recommend accepting higher voltages in return for less amps.
For next PineBook Phone/laptop generations I strongly recommend accepting higher voltages in return for less amps.