Hi Arcsylver,
How do you like the non-retina apps on your rmbp? Do you regret not having 16GB/512GB?
Jony
So far I haven't found any non retina apps that were really all that bad. they just look similar to what they looked like on my old 2006 MBP really. Nothing horrible by any means.
Most of the "problems" people report with blurry screens when viewing non retina apps pretty much boil down to the app looking like it does on a non retina screen is all. If you absolutely cant stand seeing non retina graphics etc. then it might be bad. But I personally haven't had any problems switching between retina and non retina apps and I am on my computer pretty much all the time, or some other screen based device such as my iPhone 5 or my iPad mini.
As for the RAM. I dont regret not getting 16 GB at all. I do Aperture for my photos and I have my system set up to load iTunes, Safari, Mail, and Messages every time at startup as well as mounting a remote disc on my Airport Extreme. I very often run multiple tabs in safari as well as run games like Second Life and Eve Online simultaneously both set to ultra graphics with only minimal occasional video lag, and even then only momentary during loading of new areas etc.
I am not a power user by any stretch but I do use my machine heavier than a lot of people out there and it hasn't been an issue yet for me to "only" have 8 GB Memory.
My Retina Macbook runs more stable and less glitchy than my partners Asus G75 Republic of Gamers Laptop with similar specs but better RAM and Graphics to give you an Idea.