Re: One in three chargers that is bundled with these products are never opened.
Actually, that's the end idea behind that law.
But like for the common USB plug, they don't want to force the issue right away.
At some point the companies that provides USB-C powered/recharged equipment will stop providing a charger/power supply, since they will assume everybody has one, and just mention the power the charger/power unit needs to deliver for the equipment to work/charge.