I have a 13-inch cMBP that came with 4GB of memory. Since I used to run a VM of Windows on my Mac I figured that I should upgrade my RAM to 8. I got a pretty good deal out of it so I did. But slowly the need for running the VM has stopped where altogether I no longer need to have a separate OS on my machine at all and so it got me thinking. If my current usage consists of word processing, web surfing, checking & composing e-mails, connecting my notebook to external HDTVs via a mini Displayport adapter for extending my screen real-state & consuming media content ( playing music & HD video from the iTunes Store) should I strongly consider going back to my 4GB of memory and sell my current pair that total 8GB of memory and recoup some of that cost ? In my experience, the Activity Monitor on both 10.8 & 10.9, isn't very helpful given that it ends up using my 8 GB of RAM for cache purposes so it makes it look inflated but should there be something else that I should consider from it before deciding on a course of action ? PS: Sorry but forgot to mention that I am currently running OS X 10.9 Mavericks for my Mac.