Usb-c has already proven itself to be reliable, it was designed to be reversible, it is easy to insert and remove with good tactile feedback and is compact while having lots of versatility. All traits I would love to see in an universal power plug.

To me USB-A was what schuko is today. It works and is mostly fine but I'm sure we could do better if we put our minds to it. The problem with todays plugs and sockets is they all work just about, enough that no one with any authority is going to bother with the topic. Any improvement needs to be by an unrealistically huge margin to be worth the investment required.