I upgraded the SSD in my Macbook Pro Retina myself, using a relatively cheap replacement (not sourced from Apple). As for the RAM, at some future date when 16GB is inadequate, I suspect the graphics card, CPU and bus performance will also be inadequate, so it&#x27;s better to upgrade the whole lot together and sell the Mac as an unadulterated unit. Mac resale value is far higher than PC kit. It&#x27;s not a false economy to spend more to get a Mac, if you consider the TCO. Plus, if my Mac has problems, I just take it to one of the many nearby stores. Even out of warranty, they&#x27;ll do a lot for free.<p>My arguments sound elitist? That doesn&#x27;t bother me at all, I&#x27;m afraid.