As I recall, you can do wireless charging, and even exclusively so if you want no charging port at all. Also, plenty of devices still do non-USB-c power (e.g. if it takes AC power in, that's not required to do USB-C, and if it's a car, then it's CCS2).
There's no sign of a successor to USB-C form factor in the space that EU mandates its use. IIRC, they even wrote the standard to leave some wiggle room to adopt such a successor should it arrive, but the industry seems to have settled into USB-C as an DC power strategy up to 240W with no interest in others.
Barrel connectors can be like $0.50 cheaper, so a fair number of cheap devices could balk reasonably at how USB-C drives their prices higher and they don't need USB-C. But a more 'advanced' connector is not in the cards.