1 or 2
Given his age - would a team be foolish enough to hire him to rebuild a team?
He is a defensive-minded coach. Most new hires are trending toward offensive-minded coaches & staff. Both Pete Carroll and Mike Vrabel were forced out of their head coaching jobs.
Look at his record - both as a coach & a GM - since Brady left the Patriots. You are what your record says you are.
He has several gigs as an analyst - which require much much less time.
Family considerations should be front and center at this stage of his life. I bet the family pushes him to retain the analyst gigs and/or retire all together.