Compared to the effect of outgassing on older brake systems, I'd say the effect of outgassing on modern brakes is hardly an issue. One of the reasons we progressed to disk brakes was because they don't suffer from brake fade anywhere near as much drum brakes. For modern brake pads and rotors to be suffering from outgassing, they need to be getting rather hot, hot to the point where your pads are just about catching fire. At which point, I'm of the belief that having xdrilled rotors is going to make SFA difference :p
Each to their own though.

