It prevents you from altering dll's allows applications to bypass your firewalls so they can check in with home, it locks you out of modifying your files, and it degrades audio capture to the point of being useless.
Not just a step back but a step back and off a cliff.
Comments
Ooooh, I want to write a tunnelling DLL!
Come on, MS, stop being fucktards! You can't control the net from the desktop, people will just switch or some other company will pop up and make something compatible and free of shit.