Why in the fuck do desktop computers have user-based permission models? Don't answer that, I know why, it's because they inherited them from the server-OS ancestors, but it's retarded. Desktops are personal computers, there is no reason to stop the user from doing what they want because it is their computer. Some might say, "oh, well, we can protect the system from malicious software by limiting user access to it" and they're correct, but who gives a shit? If my OS gets destroyed I'll reinstall it. It's a bit of a pain, but whatever. What's really important to me are my documents, my work, and the user-permission model does jack and shit for protecting those as the ransomware wave proved.

Application-oriented permissions are the obvious and correct way to do things in personal computing.