I'm not sure I follow your logic in this statement. With smaller updates, wouldn't less code have to be written targeting a specific issue?. This is probably what they're doing in house, but I don't understand replacing almost the entire OS to accomplish this. As you put it, "the code is behemoth", which in IMO, they just have to be copying and pasting the modified coding, into the OS as a whole. So obviously a 4 GB "update", isn't a rewrite of the entire OS.
Which brings me to the conclusion that they are not rewriting code which wipes out privacy settings users have made, that M$ was pretending to allow, but merely pasting any new code into an original version, with extant settings of their choosing. Which exactly follows my logic and user's observations, that an "update" wipes out all their settings, and returns them to the stock settings.
What they are doing is pumping more garbage, bells, whistles, and shiny new features into the OS at every opportunity, which most of the informed users, both here and elsewhere, don't seem to really really want
If you were dealing with college general student access machines, I wouldn't be surprised at all if they has an assortment of malware, different from machine to machine, hampering the process..
I don't know. I still think M$'s press releases have a lot of draconian subtexts, which many of you are ignoring.