There’s only one realistic scenario in which Bill Belichick will not set an NFL record for coaching the most playoff games in NFL history:
A freak snowstorm on the weekend of the AFC Divisional Round drops a 2015 Boston-Snowpocalypse-level of peanut-butter-thick snow on Massachusetts, and while Belichick arrives at the stadium well before game time, he is late. As we all learned in 2009, getting to the stadium late, even in whiteout Hoth-like conditions, means you’ll be sent home. Therefore, Bill is required by team rule to send himself home for arriving late, because no man is more important the team, and his playoff coaching record has to wait one more week to be broken.