Let's say that for years you used the Instamatic for everything, and never cleaned the lens, until 110 wasn't available for it anymore. Then you picked up a 4x5 with a clean, modern Rodenstock lens, and shot a bunch of sheets of Techpan. At that point, you'd be thinking, "everything I've done is rot!" ;) But you probably wouldn't be thinking that if you'd been using a Pentax Auto 110 Super, and cared for the glass. You'd be thinking, "this rocks, and the stuff I've done before is good, too."