That doesn't really answer the question, though.

Is the USB-C connector going to be the best connector for everything on into the future?

What about mag-safe-like connectors? Wireless? Something you and I can't even think of right now?

Introducing such a connector won't be an engineering challenge so much as a political one. The barriers and cost will be much higher, and quite possibly insurmountable from a practical perspective.

You can say the same thing about wall sockets. At some point you have to make a choice.

And you can always add another type of plug next to the existing one. <- this answers your question

The EU has not done this with wall sockets though. And the idea of just installing two is particularly beclowning.

Invidivual countries that constitute the EU today have standardized wall sockets long before EU was a thing. It's unfortunate that they ended up using somewhat different plugs, and if EU existed already when that standardization happened, it would probably have been a single plug instead, as with USB-C.

Italy and Switzerland and France all have multiple variants in common use - all of which are worse than the British standard.

> The EU has not done this with wall sockets though.

Because Apple doesn't make entire homes, I guess.

> And the idea of just installing two is particularly beclowning.

Why? A connector does not consume a significant amount of resources.