The EU basically said to Industry "standardize, or we'll force a standard".

It was up to the industry to propose the best standard and a potential track for evolution. Apple mostly stayed away as the rest of the industry clustered around USB (-C), so the EU has now forced a standard around USB (-C).

There is still scope for changes in the future -- see changes on power, data rates as long as the form-factor is maintained, but yes, it'll be up to $INDUSTRY to propose changes in regulation before adapters can be changed in the future.