Every suffering Apple owner entices others to share his fate, it is a trap :-) Or else, may be the constant negative campaign against Windows however possible has ensured that an average Mac user is always kept in the dark. Also, in reality, Mac OS has been patched regularly (mostly without any advance notice to users.)

It is important to realize that the stability of Mac OS X is due to the proprietary hardware - you cannot plug and test whatever you want, so no hardware is actually untested. Note that there are four or five options of Apple computers, and upgrades are prohibitively expensive - which means there are a few dozen varieties of hardware in the market, that is it. Support is a breeze. Also, in reality, Mac OS X is not bug free or secure