I can only speak for myself, but I find the thread to be a great tool for midweek browsing. In the year that I have been here I have picked up a ton of stuff from the "Old school Rave Rec'ers". I've been pretty priveledged to have new titles and even new genres introduced by some of the "Tunesday" and recently "Americana" threads. That said, between work and social engagements and obligations and the rest of life, I don't always have the time to get cranking on a full-bore thread or critical examination of an album.
A lot of times, for me, it's a way to stay connected during the busy times. I get new ideas and suggestions of older already owned material that fit the moment. Also, sometimes what I'm listening to might not merit a review/discussion. I seem to save most of my serious posting for the weekends. Just a perspective.