I am not saying that they are all still running - most of them have gone to the great computer graveyard in the sky long ago. Though I do think my Powerbook 120 with 2 megs of RAM is still out there somewhere. My point was that during their typical useful life (about 3 - 4 years, though some lasted much longer) they all worked fine except the 17" MPB, and a Centris 610 from the late 1990's.
I do agree with you in a way, as the macs i had since 1990 were rock solid, upto my favourite 12" MBP, since the switch to intel, production moving to china and Apple's fascination with ultra thin, I have had nothing but problems. The current products look fantastic, though I have replaced 2 Airs, and 3 MBP 17 due to faults, I had a logicboard replaced on a 24" LED ACD, 2 powersupplies blow go to computer heaven and awaiting my replacement i7 due to flickering. The last apple computer i bought that I still have to this day without problems is a 15" powerbook.
I still love using a mac, but now I expect to get one that is faulty due to bad QA. I have stopped buying BTO as its so much faster to take it back to the store for this reason. The exception being the i7, and I am actually expecting the replacement machine that arrives tomorrow to have issues also, which will put me at about 8-10 weeks without an imac since ordering one, not good enough, Apple has now got more money then ever so why is the QA utter crap? My housemates MBP 17" arrives with big scratches on it, I mean comeon, so damn obvious, its like they do not even check.