I would actually agree to sign a contract the bound me to upgrade my Apple hardware every 1.5 years if it would guarantee they stop ruining Mac OS X. My problem isn't so much the fact I have to replace these things so often, its that its not even that great day 1 anymore. With the exception of AirPlay perhaps, just about every major facet of OS X has gotten so progressively worse for my workflow: Safari (bogs my computer down no matter how much ram I have), dual display support (a joke since Lion), Messages (
buggiest piece of software I've ever used in my life, by a long shot), iTunes (same as Safari), etc etc etc
Edit: I'd like to point out one other thing. Before anyone chimes in with how Windows or Linux or other PC makers are worse, I completely agree with you. My position is that while Mac OS X may still be the "best", it has been a long time since it has been "good". I find little consolation in the fact that it is not "as broken" as everything else, nor do I think that's anything to be particularly proud of. Especially with the amount of money I've given them.