The issue is...
....from what I see of run of the mill customers.
Is that all new stuff should look and work exactly the same as all the previous old stuff.
However, this ONLY applies to Windows and NOTHING else in the entire world apparently.
Now in the real world IMO Windows 8 only differed from previous windows UIs by say 25% (no Start and the Start Screen mainly) but that was enough to send everyone into frothing anger.
Stuff changes in 11+ years I had to keep telling people. Are all the buttons and switches in your new car or TV in the same place as the previous one? Nope, but did you rage quit with it at the dealers just as you opened the car door? "F*ck this Climate system crap! I'm off to Audi!"
However, most people, when they realised that things change over time, were a bit more accepting.
"Well I suppose you are right!"