I think part of the delay is just that USB-C didn't really take off for cheap devices until like 2018.
Before that there was no connector that was suitable for a universal charger, we barely even knew if dynamic voltage negotiation was going to be safe or not(I remember thinking it was going to try devices with bugs).
MicroUSB was craptastic, barrel jacks aren't voltage standardized in practice, but pretty much every average consumer adores USB-C. It's like a shining example of what tech can be.
If you made a law requiring any other connector, people would probably be angry. We could probably learn to live with a barrel jack, but most likely wrong voltage connection accidents would have happened at least occasionally.
Before that there was no connector that was suitable for a universal charger, we barely even knew if dynamic voltage negotiation was going to be safe or not(I remember thinking it was going to try devices with bugs).
MicroUSB was craptastic, barrel jacks aren't voltage standardized in practice, but pretty much every average consumer adores USB-C. It's like a shining example of what tech can be.
If you made a law requiring any other connector, people would probably be angry. We could probably learn to live with a barrel jack, but most likely wrong voltage connection accidents would have happened at least occasionally.