"European consumers were frustrated long with multiple chargers piling up with every new device"
This was solved by companies no longer providing chargers with new devices. When you buy a new phone, you use your existing charger, only buying a new one when you actually need it.
If you buy a new iPhone, you get a cable that plugs into a USB-C charger.
If USB-C is mandated on the phone end:
* I'll spend the next 20 years realising I have the wrong white phone charging cable with me
* I still won't trust random USB-C cables
* I still won't trust random USB-C chargers
But - let's just do it. Maybe in 40 years it'll have seemed worth it.