I know. My point was that the fact that John Carmack was the one who said this suggests that he still finds it useful for himself, even though he is an experienced programmer. That is not conclusive proof, of course, just something to think about.

My take is that experience only lowers the value of SO for the particular platform(s) you have experience in. I've found SO very valuable in the last couple of years even though I'm (in general) not a newbie anymore, because I've had to build software for many different platforms like ruby, mac cocoa, ios cocoa, and windows (C#/WPF and C++).