I have to disagree with you in regards to the Mac. Lots of people here mock us PowerPC users but Leopard still allows me to install what I wish and make the UI look more how I want. The ability to do that after Snow Leopard has been diminishing.Sorta agree to this, but keep in mind that THIS is for security. They don't want some reckless idiot modifying root files nor a virus that somehow succeeds in changing root files. So, I think that what they're doing on the Mac side is for the best.
Regarding iOS and its lack of downgrade, I TOTALLY agree, I HATE the whole system. Jeez, let us do what we want with our devices. I understand a person who doesn't understand anything, they shouldn't downgrade, but a professional who knows what he's doing? HELL NO. It's ****ing slavery, this whole thing. Part of the reason I don't like iOS.
Liberty is often exchanged for the promise of security.