The MBP also throttles surprisingly easily. I have a 16 MBP and ended up buying a cooling stand that uses a 20w peltier cooler (solid state heat pump). It’s fixed the throttling completely, although I’m somewhat nervous about forgetting to turn the cooler off and creating condensation inside the case…
Return flight will test this with the correct cable. I expect at least 16% improvement against the 70W cap
Some plane sockets cut out completely if you attempt to draw more then the limit rather then continuing to provide power at the limit.