alt Hacker NewsThis is an acceptable failure mode. I'd be nice if there was a standardized LED flash or color that you could get so if your relative said something isn't working, you could ask, "Is it flashing three times?" or whatever.
The alternative is barrel connectors. If you plug in the wrong one, there's a decent chance that it a) won't work, or b) never work again.
And then you go someplace, realize you left your charger at home, and find out despite your friend having dozens of barrel type power connector power adapters not a single one match the size/voltage/amperage/polarity of your device.
Or you just borrow their USB-C adapter and don't have any worries.