My P1 (G4) gladly accepts power over USB-C, depending on what I'm doing the 80W my monitor supplies are not enough and it slowly discharges, but it's enough to keep it going for a day's worth of work and recharge over night.

Except that it does not unlock full power unless the slim-tip is there. It is a bit slower but on the plus side it is dead quiet and runs a lot cooler.

My ROG Zephyrus M15 only supports up to 65W in through the Thunderbolt port, even though it's a 230W laptop. Two hundred and thirty watts, and they couldn't even accept 100W over USB-C PD, they had to limit it to 65W.

I'm in the process of replacing the crappy thing with a proper desktop.