Do you choose what version of a web site you use? Generally no. You trust that whoever is running it cares enough to not break it for you, just like Chrome users trust Google to not break their web browser.
Exactly. I can only buy this line of thinking if you're in charge of mission critical machines (if it ain't broke, don't fix it).
For the vast majority of people, heading down this rabbit hole isn't worth the effort.
(On the flip-side, it would be nice if there was a magical "undo those updates to point in time X" feature in case something went wrong and you wanted to see if it was because of an update).
