True, but it's a 4 years old machine, I do not know about you, but I do expect that a Workstation will be supported for 5 years at least, maybe this got lost in

True, but it's a 4 years old machine, I do not know about you, but I do expect that a Workstation will be supported for 5 years at least, maybe this got lost in the world in which a guy buys a iPhone every year, back them Apple had no iOS devices, it was the Mac and iPod (which was a fairly simple environment), so I disagree that it was so simple to predict about that 4 years in the future you would be unable to upgrade to a new version, Apple did not said back them that you would be unable to run the a new version of the OS in 3 and a half years.