As mentioned in my post the NextSTEP integration - OSX - was a major branding effort for Apple. It was the reason for Job's return to Apple and was seen as the

As mentioned in my post the NextSTEP integration - OSX - was a major branding effort for Apple. It was the reason for Job's return to Apple and was seen as the savior of the company. I think Apple wanted something to hang their hats on that lived for many years. It's weird and clunky, but makes sense in the history of the company as all previous OSes were numbered. Yes, they probably should have moved off that convention earlier, probably by the time the Intel integration had happened at the very least.