There will obviously be a distribution of people. But those who haven't upgraded from XP yet are more likely to find changes disruptive. You should have heard

There will obviously be a distribution of people. But those who haven't upgraded from XP yet are more likely to find changes disruptive. You should have heard stories about installing alternate browsers and having to change the icon to that of Internet Explorer, because users know the IE icon is how you "connect to the Internet". Similarly the complaints about the MS Office ribbon interface are rarely about its actual functionality, but rather about it being different than before. You are right about phone upgrades, but they are far more incremental with only regular small changes across apps and the phone OS. That is far easier to adapt to, than the OS and apps all changing after years of no changes.