"Apple have come out with five major upgrades to OS X, upgrades which (dare I say it?) install with about as much effort as it takes to brush your teeth in the morning. No nightmare calls to tech-support, no sudden hardware incompatibilities, no hassle."
This is just not true, install, for example, OS X 10.4.6, do the updates then you find you have to do more updates to fix the updates.
Then there's the fact that every single update seems to cause niggly problems (i've twice had to archive and install after updating).
Now I trawl the Apple forums before even considering installing any updates to check on exactly what problems i'm likely to have (and this is on a MacBook Pro so no unusual hardware...)
With regards to Tech Support from Apple - it is terrible! Go into a store, explain to the 5 salesmen that try to flog you more Apple gear that you need support then wait 30mins for the 1 techie to appear. The forums are OK but full of over protective fanboys suggesting that the problem is anything except an Apple problem.
I am, in the main, a happy Apple user but lets not pretend they're as perfect as the fanboys would have you believe.