Not everyone has issues with Apple Software updates.
I have been an Apple user for over 20 years. Never encountered any issues with any of my computers or devices
It’s always a very smart and prudent idea to always perform a backup before doing ANY major computer or mobile device system upgrade/update, to have insurances, in case that something goes wrong with a particular OS upgrade/update.
I have a nearly 10 year old iMac that is STILL running OS X 10.9.5 Mavericks and it runs great on my iMac.
While I have another hard drive with OS X El Capitán on it, I have to stay with OS X 10.9.5 Mavericks due to older, legacy software constraints.
The ONLY THING most users were upset and angry about in OS X 10.9 Mavericks, AND to this day, was the removal of colored folders replaced by a tiny colored dot, for folder and data organisation!
Mac OS user feedback STILL exists. Apple NEVER got rid of it!
Here’s the EXACT feedback page here.
https://www.apple.com/feedback/macos.html
So, I don't know why you think Apple got rid of their Mac OS feedback page, they didn’t!
Why purchase an expensive Pad Pro if you never plan to ever update it?
I use mine as a creative tool and sketchbook and many of the apps I use keep getting better with every iOS upgrade/update.
All of my drawing/painting/sketching apps got a big boost for me when I upgraded my iPad Pro.
You must NOT use an iPad/iPad Pro or MacBook Pro for any real work, then?
Paranoid much?
I have, at least, upgraded my computer and device OSes when I felt I needed to.
I have NEVER, EVER felt forced to upgrade/update my Apple stuff from Apple or anyone else.
I usually wait quite awhile before I do any Apple computer or device upgrades/updates.