Look, there's Cher on the cover in silver snakeskin, and looking not a day over 40. She's a survivor, to be sure, and so is Architectural Digest, the shelter behemoth that seems hardly to have aged at all in the nearly four decades since a cheap quarterly transmogrified into a European-style glossy in a tiny Los Angeles office. But last week, Paige Rense Noland, the magazine's 81-year-old editor, inventor and fierce brand steward, called it quits after 35 years on the job, leaving industry insiders scratching their heads over who would succeed her without rocking AD's very sturdy boat. You could carp about its staid layout, its flat, bright photos of the third and fourth homes of studio executives, hedge-fund managers and movie stars -- the National Geographic of home magazines, some said -- but like National Geographic, it was the one people saved. Here was a shiny catalog of the good life, organized on a simple premise: the magazine-as-club. Ms. Noland made sure that when your house appeared in Architectural Digest it was like a victory lap, proof you'd joined the winners' circle. ''I just wanted the decorators to be the stars,'' Ms. Noland said. ''I just wanted to report what they did.'' [ABSTRACT FROM PUBLISHER]