I am probably going to get some blowback due to my opinion on this subject, bet here goes anyway. I am glad Apple has not changed the iPhone port to USB-C, and I hope they hold off for as long a possible. (1) I already have many lightening port chargers including iPad chargers along with many lightening to USB-A cables, due to various devices purchased by my family since 2012. I hate to see those start to become obsolete. They just work. I love the lightening connectors. (2) I already have a 2017-vintage HP 2-in-1 Windows Notebook computer that includes 2 USB-C ports, so I already have experience with this port. My own experience is that USB-C charger cable is a bit flakey and I have to hold it "just so" in order to keep my charger connected. I have a USB-C thumb drive, and it just doesn't connect as fast as comprable USB-A drives. Finally, the USB-C connector does not seem to be as robust as a lightening port. I think it is partly due to the use of a small "female" connector on USB-C. The male lightening connector just works more reliably. (3) IMHO, I suspect that the majority of "ordinary" users who don't read tech blogs would not happy with a sudden change to USB-C for reason (1). If or when USB-C becomes "standard" on iPhones, I will adapt, but I am just not looking forward to it.