I've been an Apple user for a long time.
I will not be buying a "Retina" MacBook Pro solely because I do not agree with the direction those machines are heading in. If Apple continues to depreciate existing hardware in favour for machines that are literally held together with glue, then I will never buy an Apple laptop again.
There's a dozen ways in which Apple could have gone about the assembly of these machines differently, and left the lithium packs easily removable and serviceable. But they didn't- they sprang for the cheapest and fastest way of assembling the machine and covered the whole thing up with a healthy coating of "because we wanted to make it thinner" marketing ********.
These machines are disposable, plain and simple- the same way the iPad 2 is. They were never designed to be serviced, they were designed to fail and be replaced. You absolutely 100% have to purchase Applecare with the rMBP because you'd have to be insane not to- if your battery goes, the chassis is toast. If a single bit in your 16GB of main memory (note that the rMBP RAM is not ECC) goes, the logic board is toast. If your iSight breaks, your entire monitor is toast.
I'm all for thinner and lighter systems, but the rMBP has simply gone too far. And that's disappointing. And for the first time in a long time, I'm actually siding with the environmentalists on this one- I hope Apple feels the burn of their actions, and that this actually hurts them in the long run.
Only then will they realize how jaw-droppingly retarded building systems like this actually is, and we might get new models that are only marginally thicker (less then a millimetre) that are actually reasonably serviceable.
-SC