While I agree that most users (of Windows, Chrome, OSX, iOS etc) are forced/tricked onto the auto-update treadmill, atleast with Windows and OSX I can re-install the older version. With iOS and such it is _impossible_ to downgrade. With Chrome I suppose if you get some kind of non-web installer, you can go back and then disable the update service, but that probably is an unsupported configuration and very likely going to break at some point.

To your last point, I would say I am ready to accept it from anyone except an advertising company whose only primary means of making money is by sifting through my personal data and spying on my online activities. With MS, I have little doubt that they "would if they could", but at-least for now, they wont, since they're making more money selling actual products.

People will complain if the colors change. I mean it's not great when things change from under your feet, but it's a OS update is a "we're doing this for you"-kind of deal. People who upgraded knowingly are generally satisfied.

You can reverse any Windows 10 upgrade for 30 days, whether it was an upgrade from 7, 8.1, or a different version of Windows 10. The revert process works... most of the time.