Did they do a study for how much e-waste would be generated by forcing 2/3 of all phones to switch to USB-C? If half of all phones had USB micro-B and more than a fifth have Lightning, how many of those accessories, cables, and chargers would end up in landfills because they can no longer use them with new phones? It seems to me they'd generate a lot less e-waste by forcing people to USB micro-B, though I doubt anyone would want that since it's a terrible connector.
The natural solution would be to leave things alone and stop forcing people to change if they don't want to.