Better buy a 3 year warranty to cover your butt. Without that, failure after 90 days means buy a new computer. Back to 1984. Back to Apple.
Airs are the same.
iphones are the same.
ipads are the same.
the only caveat to this is that those devices are consumer ones, not professional, as the Mac's moniker would have you believe it is. Using the Mac Pro as an example, a certain amount of customizability is expected in a pro device. Desktops with drive slots and PCI and multiple hdds, laptops with express ports and at least access to internal parts. Apple has been working towards a lockdown of their systems and use a prosumer approach having already replaced 15" express slots with SD card slots (not even multiple media readers, JUST SD). Perhaps Apple has changed its idea of what their definition of professional is. Perhaps it's got nothing to do with tinkering around with the innards. A professional is not one, for example, who has decided before Apple that the optical drive isn't viable anymore and replaced it with a second, SDD, drive. A professional is someone who needs not think if such things and just needs speed, power, visuals, and portability. The retina. MBP is not a tinker toy but a specialized device for professionals in their respective fields. Apple has tried to cram as much as possible into this machine and had to shake up the idea of stock options. Memory is specialized, battery had to be redesigned. The major problem with this proprietary design and components is that most professionals spend as much as they can on a Mac with the assurance that when their new device yields them some dividends they can finish getting the machine they wanted, ie upgrading. Taking that away and knowing Apple's practice of gouging for RAM and storage taints this new design. Yet, look at the trade off. Visuals, power, speed. If it works for you great. It it doesn't, this isn't the product for you. For now, you have other options.
But having mentioned the Mac Pro, if this prosumering approach by Apple finds its way to it next year I think it would cause more issue than an added high end notebook to the MacBook line.