Dell business laptops (and probably others) warn you if the power supply you’re using is not capable of supplying sufficient power.
This would be a really handy feature for the PPM.
Some kind of overlay message along the lines of “the power supply or cable you’re using is not capable of supplying enough power to run the projector, battery is being used as a supplementary power source”.
For the average person it seems as though it’s all too easy to come unstuck with high power over USB-C. I have learnt stuff about it by reading these forums but the average consumer will need a helping hand.