As much as I don't like the lack of updates, I wonder what people here would do if they were in charge of such a large corporation as Apple. Shareholders (some of which might even post here, who knows?) demand that the company makes money, not that it keeps releasing models with the latest hardware available. Maybe, just maybe, yearly complete lineup refreshes isn't in the shareholders best interest, or is it?
From 2003 to 2010 Apple updated the aluminum tower pro workstation every year or two while transitioning to an entirely new processing architecture.
Since 2010 Apple have updated their professional workstation once. One update in 6 years. Well, maybe one and half updates, since in 2012 Apple bumped the CPU GHz by 5-10% (while failing to adopt the latest Intel chipsets). And the one major update is viewed by most pro Mac users as a serious downgrade in features.
I don't have any data, but judging by the local studios and word on the internet, pro migration from OS X to Windows has been significantly higher since 2010 than it was from 2003 to 2010. Those who rely on heavily multi-threaded apps are furious with the Tube introduction and subsequent neglect.
Surely there must be a happy medium between yearly updates and one update every six years? Perhaps longtime pro Mac users even have some useful ideas about what sort of computer they need?