This Apple being weird and special again. The reason for ditching floppies was actually quite simple, it outlived its usefulness. It was replaced by CDs, DVDs and at a later time USB-sticks. There is no actual need for floppy disks and therefore FDDs are obsolete. This is however not the case for the 3.5mm jack. Apple likes to "innovate" by removing sensible things from their electronics. Their new Macbook, for instance, has only one single usb-c port and no other ports. You can call this strategy brilliant but in practice this means that people have to buy an extra adapter to connect all their peripherals to the one single usb-c port. It's not an improvement, it's a cashgrab and an annoyance. And naturally the Apple customers are gobbling it up.
The same holds here. What's wrong with the standard 3.5mm jack? It works, it's universal(and I believe unencumbered by patents) and the peripherals are everywhere. It's a solution that works and any "better" idea on audio should at least be included side-to-side with the old adapters as this will allow an actually better standard for audio ports to form. As it is, this is a simple money and power grab from Apple by making stuff incompatible. Sure, you can buy a converter, but knowing Apple this will cost you dearly. Apple is being annoying again and the audio peripheral market will suffer as this will gain traction as Apple has clout in the electronics world.