I think you answered your own criticism of the article being "funny". The author of that article isn't saying that the relative lack of ability to tinker or upgrade makes the MBP-RD a bad choice for most people. He said the response has been "overwhelmingly positive" but that "
Apple has instituted a number of design features that are likely to peeve some power users off, especially those who enjoy tinkering with their machines". I think that's fair to say.
We all realize that Apple makes these design decisions in order to realize their vision of the most perfect product and user experience possible with the latest technology. However, some of us want different things than Apple wants for us, or we place a high value on the ability to tinker, upgrade, and change. I would rather be able to swap in another battery on the fly than have a seamless, thinner body. I'd rather know that I'll be able to change out to a larger SSD next year without worrying about whether I'll be able to find a nonstandard drive than have a thinner laptop. I'd rather have the option to upgrade RAM later than have a slimmer body now.
My Thinkpad W520 is considerably thicker than the MBP-RP and has a large power brick. Neither of those bother me. It cost me $100 to upgrade from 4GB to 16GB of RAM, and if I ever want to plunk for 32GB, there are 4 easily-accessible DIMM slots waiting for me to snap in some 8GB DIMMs. I can put an mSATA SSD for the OS/apps in the PCI-E WWAN slot, pop out the DVD burner with the push of a button, and RAID two hard drives (the primary HDD and a HDD popped in where the DVD burner used to be) for a total of three drives (SSD plus two HDD in RAID). Everything can be changed - the keyboard too pops off if needed, and the entire modular design is such that your can pour a glass of water straight through the keyboard, and it will channel out of a hole in the bottom of the laptop without damaging any internal components. If I get stuck on a long trip without time to charge and the high capacity battery goes, I have another one in the bag to snap right in. The same laptop has a 15" matte 1900 x 1080 high gamut display - one of several display choices which suited me.
My 2008 15" MacBook Pro was a terrific performer until the battery could barely hold a charge anymore in 2011. At that point, I bought a new battery for under $100, and some new owner has been enjoying it ever since. Now likely Apple will be willing to do those swaps for future MBP-RD owners, but I'd strongly prefer to do it myself.
Here's the bottom line from the iFixit teardown:
Step 22
MacBook Pro with Retina Display 15" Mid 2012 Repairability Score: 1 out of 10 (10 is easiest to repair).
Proprietary pentalobe screws prevent you from gaining access to anything inside.
As in the MacBook Air, the RAM is soldered to the logic board. Max out at 16GB now, or forever hold your peace—you can't upgrade.
The proprietary SSD isn't upgradeable either (yet), as it is similar but not identical to the one in the Air. It is a separate daughtercard, and we’re hopeful we can offer an upgrade in the near future.
The lithium-polymer battery is glued rather than screwed into the case, which increases the chances that it'll break during disassembly. The battery also covers the trackpad cable, which tremendously increases the chance that the user will shear the cable in the battery removal process.
The display assembly is completely fused, and there’s no glass protecting it. If anything ever fails inside the display, you will need to replace the entire extremely expensive assembly.
To conclude, I know most people buy a laptop and never upgrade it. Many are happy to change laptops every 2-3 years, and most will love what Apple has been able to create here. I like to tinker and upgrade. It's all part of the fun for me, and it's one of the reasons I love the Mac Pro and am looking forward to the 2013 long-overdue revision of that line. I bought the very first Intel Mac Pro, and the internal design of that computer is genius. The first time I watched someone pull out the drive trays and slide them back in without any wires, etc, I was sold. Pretty much everything I like about the Mac Pro is a turnoff about the MBP-RP.