Yes it is good to know that anything over 4 GB memory will be wasted space. I'll probably wind up getting that and maybe a second HD, and getting the 2014 Biab/RB upgrades. Then just stay with Windows 7 32-bit till Microsoft stops supporting it. That's what I did with XP all those years.
That will be adequate for making Real Tracks/Real Drum backing tracks to use for my solo guitar act.