You've probably seen it by now, the much-maligned Peloton ad. But what was it about that head-scratcher of a spot, what are the lessons learned and what might it mean for the brand? We discuss.  Plus, Adweek's final issue of 2019 looks back at the last 4 decades as the magazine celebrates being 40 years bold. We also look ahead to the 2020s and beyond. David Griner and Ko Im co-host and are joined by senior editor Robert Klara and Senior Art Director Dianna McDougall.