It amazes me how much coordinators & coaches get shuffled around in the NFL. Even the bad ones always find work somewhere else. At some point I think you have to go, 'OK, this guy's been fired every other place he's worked, maybe this is a bad idea?'

Why are teams so reluctant to give someone new a try?

The Chiefs had two back in the day. Marty and Kurt (If I remember correctly). Marty gets a bad rap because he never won much in the playoffs but his regular season teams were pretty good although the offense was a little boring.