Quick question for the forums. I haven't upgraded memory in a long time, so maybe things have changed since my last trip to OWC. We used to always replace ram instead of adding to it. Replacing with matched ram, same manufacturer, same size (4 x 4 = 16 or 8 x 2 = 16 not 8 + 4 + 4 = 16), same cadence etc. But looking at the current macsales page, it looks like they are saying to add their ram to the stock system ram pool not to replace it. What are the thoughts on this/common wisdom. What issues if any have been encountered. Thanks all!