[ThatPlayer]

>If USB-C is mandated,

USB-C doesn't have to stay mandated. Once every single device and charger is using USB-C, they can let the law expire and the market will keep it a de-facto standard because no one is going to buy a phone that doesn't have USB-C unless it has a lot of advantages. Notice how micro-USB is no longer mandated in the EU?

Also USB-C isn't mandated the only port on the device. Add multiple charging ports. Plenty of laptops do that, even a few phones. It'll make the transition easier for people too because they can continue to use their USB-C chargers if they decide the new technology isn't a necessity. Just like how plenty of commenter here want to keep using Lightning cables.