Why do people think it is a good thing to have this enforced by law is beyond me. I don't see any win besides a minor convenience. A lightning cable weighs almost nothing and it's not a big deal to have one around. As to lightning port limitations, I question whether usb-c will give average iPhone users any other advantage other than charging their phone. What are people gonna do with it other than charge their phone…
Having unified, standard cables and power bricks means more reuse, which reduces waste and cost. It means someone switching from Android to iPhone or vice versa doesn't need to replicate all their cabling. It means users can buy a third party cable without paying Apple for a licence or a patent. These are all good things.