MacLeech It’s not a “simple” numbering change, and is a change without any real reason or advantage. How does knowing in which year something was released convey any more important information than a version number that follows a sequence, and details the evolution of a product, including the fact that one is more mature than another? How is it better for all product lines to have the same major version number?
How does one know which version is current? That’s what Apple’s Web site is for. Alternatively, you use your precious Apple device, and tell it to check for updates, and it will tell you if an update is available and/or if it is the most recent version your device can support. See? A simple re-working of the display that tells you your version, compared to the latest bleeding-edge, newest-fanciest version would have been “simpler” and more useful than issuing new major version numbers for all of their platforms, leaving (more) holes in the version number history.
The only plausible justification I can imagine is that Apple wanted to make sure its customers understood the “scary” (that’s an Apple-ese technical term, remember?) nature of not having all products on the same version. So they better rush out and “upgrade” any products that are unable to stay in sync with all of the others, lest terrible things happen.
What’s next, will they pull a Microsoft and insert extra, obfuscated code to make sure terrible, inexplicable things start happening to compel upgrades? No, not honest, considerate, infinitely-innovative Apple, right?