I know there was and is a bunch of threads of 8GB vs 4GB. And I read a couple of them. Still nodbody seems to answear the most basic question: Will 4GB Ram be enough for next 3 years of OSX updates? I don't want to save $100 on my initial purchase only to find my OSX being slow after updating the operating system. I don't really do anything more intensive than web browsing, multimedia playback but still, I hate to have slower OS than what I initial bought the computer with. I understand that after 5 years laptops just simply can't support newer operating systems but IMO 3 years should be snappy and fast as after initial purchase.