Other than the age issue, Payton had the same issues listed about from BB. He had a team with no succession plan for when Brees retired and he wants total control over a team. Parcells was more or less in the same position after the Giants. Yet teams hired them. Right now teams are looking for the hot young prospect but I would bet by next year there will be a team that thinks they are very close that hires BB due to his experience and thinks he can get them the little bit more they need to get to the SB or win it.
Could be a team like Buffalo, Dallas, Philly or even the Saints if the new OC fails and DA gets fired. He's likely not a fit for a young team that needs to be built.