USB 2.0 I would buy, I’m sure they have the telemetry to tell them that like less than 1% of iPhones are ever plugged into a computer or data accessory at this point. USB 3 would be nice but it’s not a dealbreaker for almost anyone.
MFI certification I don’t. They didn’t do it with iPads or MacBooks, why with iPhones? It just doesn’t pass the smell test. Just one product that shares the same connector with all their other products has an MFI program but all the others don’t? Even though when it was Lightning, MFI applied to all of them?
It’s possible they will launch a program, but it will just be one that allows you to put the little “MFI” icon on your box. It won’t be one that will limit charging speeds. I get the uncertainty if this was the first Apple product to switch to USB, but it’s the last major one. Just wouldn’t make sense.