I remember the Natick Mall back when it was a typical postwar suburban shopping center with middle-of-the-road stores and a food court. Only a distant memory now. It was able to reinvent itself as a collection of upscale retailers and residences (in fact, I think the literal name is Collection), as it is located in a largely recession-resistant area with lots of affluence, which is why it continues to thrive. Reinvention appears to be the critical word for mall survival, as old stores leave (JC Penney) and new ones elect to move in (Wegmans), with other uses mixed in (condos).
Closer to me, the Arsenal Mall us technically dead, but is being reborn as Arsenal Yards with multiple mixed uses, spurred on by those priced out of or who want proximity to Cambridge. The Watertown Mall across the street is almost dead but will never die because of the RMV, Best Buy, and Target.