Industry standards have to change.
IDE became SATA.
Standard drives became SSD.
Floppy became CD/DVD's.
VGA became DVI became HDMI.
CRT became LCD.
Wifi B and G became N and now AC.
Serial cables and PS/1/2 ports became USB. Apple wants everything to be thunderbolt because it creates unity. It can carry any type of data. Imagine if audio video and data were all just one type of connection, nothing else. That would be amazing.
Things need to change for the better, and it's always Apple that gets attacked for leading such change.
Dropping optical drives for example. Discs are stupid like floppy disks. I'm sure the first computer not to have Floppy drives got a negative in it's review because of it.
Better technology will catch on, like always. Just wait. We can't use old tech just because it is widely supported and nothing else. This has expandable RAM and storage. PCIe is faster than SATA so that is good.
Embrace the future. My opinion.