So if you have say a 16" MacBook Pro, you need to get not only Thunderbolt 4 which is a rare spec, you want to ideally get ~85-140w PD not ~60w, AND you need to get an expensive dock that can split up the two HBR3 displayport channels instead of a regular MST Thunderbolt 4 dock.
Thankfully Apple has a solution to consumer confusion caused by all this. Buy a $1600 Apple studio display, connect it directly to your Mac, use the monitor itself as a dock, and everything will be compatible. Stay in the safe walled garden.
USB-C is a mess. Whoever decided to fix the annoying compatibility issues of USB mini/micro/blah blah by just solving the physical port problem should never be consulted on anything again.
I get that it would be cool. For the ipad i think it makes sense to do that, but your phone...? Let's get real. Fast charging over a standardized cable with 10gbs transfer speeds is gonna be just fine.
If you shoot videos longer than a few seconds on your iPhone, you will appreciate a way to get them off of your phone at a non-glacial pace.
For professionals shooting significant amounts of video, this is more than a convenience feature. Once your device's internal storage fills up with video, which does not take long at 4K60, now your "camera" is a paperweight until you can dump that footage.
Obviously, only a very small percentage of people are using their phones this way. But I think Apple really values that market.
For people who want to have e.g. 100W+ of power while feeding a signal to 4K60+ external monitors it's kind of a nightmare unless they know that "just use Thunderbolt 4" "trick".