So I'm looking to buy a rMBP, and my question is whether or not I should give up the extra $180 to upgrade to 16 GB RAM? I would be using this laptop mainly for school, but also a few personal things. I plan on using it extensively for about 4-5 years through college (Software engineering), maybe longer. This in mind, I did want to run Windows in either a VM or BootCamp, but I can always put this aside, as I don't think it's absolutely necessary. With my current laptop I use about 4.5-5 GB or RAM out of the 16 GB I have, so I figured I'll be fine. However, over 4-5 years will 8 GB hold up to whatever OS X and it's apps throw at it?