It still come back that after three years, sure you have a copy of cs6 but none of the PSDs you've made using CC will work fully. Then they jack up the price at the end of those three years and now your hands are tied. Do I trust adobe to support CS6 with updates? Nope. They've never done it in the past with any releases. They simply released a new version of PS.
Yeah, now you are just creating conspiracies from thin air. My files from CS2 and CS3 still work in CS6, and seeing as Creative Cloud is based very much on CS6 w/ upgrades, your PSD files will still work. Or, you can save them as .tiff, .dng, or a variety of other formats that work perfectly fine in a dozen other programs.