Well, for me, the selling points are:
-
Versus earlier versions of USB, it's reversible. This isn't a game changer, I guess, but it's definitely nice to not have to fiddle plugs around all the time.
-
I don't know if it's the only form of USB that does USB PD -- I'd guess not -- but in practice, it seems to be pretty strongly associated with USB PD. Having USB PD isn't essential, but it makes charging larger devices, like laptops, a lot more practical. I can lug around a power station that doesn't need to have an embedded inverter.
I still feel that it's kind of physically small and weak compared to USB A. That's an okay tradeoff for small portable devices that don't have the space for larger connectors, but I'm kinda not enthralled about it on desktop. I worry more about bending connectors (and I have bent them before).
So for me, I'd say that it's definitely nice, but not really in a game changing sense. I could do the things it can do in somewhat-worse ways prior to USB-C.