Apple forced to ditch iPhone lightning charger

Eh, I don't know Apple's intentions but this specific design change isn't that complicated. The lightning port still uses the USB protocol so the firmware will be the same or very similar. The supporting electronics also wouldn't change much, but at most they'd omit/add a few small passives and slightly reroute that part of the circuit to make things fit together. They'd also have to lock down a large production run of USB ports, but any manufacturer would accommodate a customer as large as Apple. They'd need to test fit it with the new phone chassis but that's relatively simple as well. Regulatory certification would also be smooth sailing for a change this simple, since most of what's changing is simply the form factor.

I figure it would take two years before customers would see this design change from the moment engineering was assigned it.

I'm an electrical engineer who works in production if that matters.