I totally agree with the author. I was not planning on getting retina.
First of all, I can put my own parts into the laptop and it will run just as well as a retina, complete with 512gb of flash storage and 32 (!) gb of RAM, for less than $600.
Retina is just a gimmick. Hopefully apple will see the light and put a retina on the user upgradable 15". Then i would buy in an instant. Right now I am holding off..
Where are you getting RAM and SSD prices?!
Let's start with a base 15" MBP:
Add the high-res anti-glare display, and you're at $1900
Add a 480-512GB SSD for $5-600, and add, let's say, a very conservative numer of $250 for another 28GB of RAM.
You're at $2700-2800, and you don't have a Retina display or the thinner form factor. But you do have ... and optical drive? I guess I'm not seeing your point (which, until I actually looked at the numbers, was my point as well.)
My thought was go upgraded base. I'd be hooking it to an external monitor already, so the retina display is a bonus, but nowhere near a necessity. I already have an MBA and iPad, so the thinner form factor, again, is just a nice bonus.
But it financially makes more sense to get the RMBP, unless you truly think you're going to be constantly swapping out storage, or burning DVDs on the go.