I just have a fundamental problem with buying a piece of software and then having the developer, or worse, Microsoft/Apple, tell me how I can use it.
A ZDNet article just upped the number of devices you can install an app on from their store from 5 to 81. The issue for me isn't the number of devices, but why they should have any say once I buy it.

Note that this model of app store vs buying actual hardcopy, is something Microsoft et al have been pushing for for decades. I sincerely believe it was Bill Gates' dream to turn your computer in to a dumb, internet terminal; a device, whose content, like television, is completely controlled at their end.
I didn't get interested in computers to sit in front of it and use what was spoon-fed to me. And the trend towards authoritarian control of software ticks me off.

Try to imagine Hank Rearden trying to sell some of his metal to Taggart Transcontinental and then trying to tell them they can't pull the rails from the John Galt Line to use on other parts of the railroad...