I see that most of your examples are older. My point was that Mac reliability may not be what it once was
today.
The issues I've encountered have been with 2010 models and newer. My first Mac, a PB G4 17in, lasted me for 8 years, until I sold it (in working order).
I don't abuse my laptops; their use has been identical to the PB I mention, but the issues have become more common. I would fix them, then sell, at a rate that I actually bought a new Mac every year (thank you, resale value).
The iMac was the biggest disappointment, and despite loving the concept of it (beautiful machine), I'll never buy one again. I am 2 for 2 with those (I sold the first right after getting it fixed under warranty);I really wanted to keep the last. But that sucker gets WAY HOT.
Graphics cards and CPUs are far more powerful today and generate a LOT of heat; combine it with HDD and screen heat and you got a furnance in there. I even found an incident online where the screen simply fell off one of the new ones (while the owner was using it). This is easy to believe, given the heat the machine can produce combined with the fact that the screen is
glued on.
So, right now, I'm stuck with purchasing an under-powered Mac mini or an over-powered (and likely EXPENSIVE) Mac pro...
Fedora is looking better by the minute... (I saw a mod that made it very OSX-like)
But I really don't want to leave...
I still think that Mac laptops are the best in the business though, as is OSX. Apple is just not giving me the
hardware I want (took away the 17 in MBP too). Bummer.
So bottom line, temper expectations (and get Apple Care).