I've never really understood why they hadn't done it yet. The iPad has used a USB-C connections for a few iterations now, they got a lot of criticism for switching only to USB-C style connectors on their Mac line years ago, yet they've resisted bringing the iPhone into the same ecosystem. There's a lot of third party peripherals that are reliant on lightning, but that doesn't really seem like something that would hold Apple back.
I feel like a Thunderbolt 3 iPhone has been possible since at least iPhone X. If Apple went all-in on a high-bandwidth connector for all their devices, maybe they could resurrect the dead dream of FireWire.
Me too. One of the stated benefits of the Apple ecosystem is how well they work together. Except when iPads and MacBooks all switch to USBC and iPhones stay on Lightning.