One of the few eighties metal acts to enjoy success without resorting to a reunion tour, Metallica became the top cover band in the world, whether covering others (as on Garage Inc.) or themselves, with orchestral backup (as on S&M).
Battles with Napster notwithstanding, it almost sounded as if James Hetfield et. al. were starting to have fun with their music. Whence, then, St. Anger?