I'm not sure there's another company of Apple's size and influence which has consistently been so ready to dump legacy at least a beat before its customers were prepared for it. Headphone jack, 5 1/4" floppy, I'm sure a bunch of other things I'm forgetting.
"I'm going to dump Apple over this!"
"See ya. Don't let the door hit you on the way out!."
Does anyone miss floppies? CDs? What about SCSI or ADB? I can't think of one thing Apple dropped that caused such an uproar at the time that people regret now. Sure, I bitch about my laptop not having an SD reader, but Apple hasn't shown me what's next for its replacement other than thinner (meh). SCSI->USB/Firewire->USB2->USB3->USB-C this all made sense.
You're right; I was accustomed over the years to point to PS/2 as an example of the PC world being slow to give up on an outdated port, and carelessly conflated that with Apple using it.
"I'm going to dump Apple over this!"
"See ya. Don't let the door hit you on the way out!."