Well, I use AirPods and love them, so removing the 3.5mm jack was a non-issue for me. But as someone who uses an iPhone for long FaceTime calls, and uses an iPhone on long flights (and I see a lot of other people doing the same), I think it'd be extremely inconvenient to have no wired charging port. I also see people every single day walking around with their phones plugged into battery packs.
So I don't have any "data" on it, just like you don't have any data on the opposite case, but if you can name practical advantages to removing a wired charging port I'm all ears, because I only see disadvantages. If the iPhones already have wireless charging, how does removing the wired charging port make them better and more convenient?