It is true, that Apple do far for than most in this respect. For example a few months ago Apple 'quietly' fixed an issue that was almost certainly a Microsoft issue, with Office and the way it worked, or rather didn't work so well with spaces (formatting palette getting lost in spaces!'.
Apple, also do more than most, with quiet updates for applications. I really like the fact they Apple do regular updates for iPhoto and the like, including RAW formats for new camera's. They give these to everyone, not just those that have bought the latest version of iLife. This is unlike pretty much unlike any 3rd part app provider would do. So I suppose in this respect Apple share the wealth of success with iPhone to all of the Apple community.
I would really like to see more stuff coming onto Apple, particularly in the area of medical systems, diabetes Blood Glucose device apps, online medical care databases, currently only supported on PC (yes even web-apps, such as Medtronic CareLink). I would like to see Apple do the best they can to encourage those 3rd parties sitting the boundaries, to do more than dip the toe into Mac OS X. For Apple to be seen as a serious contender to other OS's, with the new dawn of Google OS on the horizon, and other cloud OS providers coming there must be many ????'s
I think I entered this conversation, with the view that it is a good idea for people not to jump on the bandwagon with new releases too quickly. I have never known a new release on any OS, go without hitches. For example, in UK local government, it took them 3 years after XP release to provide it the customers, although frustrating to many employee's it was essential to ensure full computability across services before distributing it. They haven't even considered Vista!