The last big update I accepted from Microsoft made my HFS partition disappear and while it didn't hurt me, it broke thousands of webcams. It messed up some other things for me too, I just can't recall what they are. I rolled it back. Then again, I agreed to update my phone with Apple's beta updates, and iOS 10 v 6 is tight. My wife's super old iPhone could do the same thing. Your point sounds like it makes sense until the details come in.