Have Mandatory Installs Ever Been Fully Explained Why They're Required/Necessary?

Your right, I'm stupid lol. I'm hungry, need snickers.

You just answered what I was talking about and what the OP was asking in regards to how much the HDD can actually hold. Why ask a question and then answer that question? How are you doing? You're doing good.

IGN claimed they maxed it out and they gave a number....I don't have the article but I'm sure you can google it.

I believe it has something to do with Blu Ray streaming speed.

Considering the amount of data needed to be accessed, and how much slower it is to access that data on optical media as opposed to an actual HDD, I'd say that would be the biggest reason. Not to mention the amount of wear and tear that the optical drive
would go thru over the course of time when playing games. People already get upset when they have to send their console in, I could an even larger amount of RMAs going on as the result of playing games off just the discs.

The 360 had nowhere near the amount of data that some of these newer games have and could run the games just fine off of optical, but Take Dead Rising 3 on the X1 for example. The first update was 5 gigs. Second update was 13 gigs. Now mind you most of that
was updating existing game code that was installed on the HDD but still the over all install was close to 40 gigs. DR3 suffers no loading times now when going from one area of the map to another. I would think that you would see this huge amount of pausing
while you went from location to location while you loaded from the optical disc as opposed to the HDD. The read speed is so much faster on the HDD.