Well, this is it. My PPC machine will still run 680X0 apps under emulation up to and including Tiger – that's backwards compatibility to 1985. Their backwards compatibility has all of a sudden been reduced to four years.
If you spend the best part of 2 grand on a studio workstation, you wouldn't expect to be forced to replace it in 4 years time. My machine was more powerful than I needed when I bought it and I never seem to have really used it to it's ability, and now I'm going to be forced to replace it.