It also depends on what kind of challenges the team faces in the first place. If there are a lot of issues stemming from faceless corporate policies or bugs in

It also depends on what kind of challenges the team faces in the first place. If there are a lot of issues stemming from faceless corporate policies or bugs in external tools or something then venting about these things for a few minutes every meeting could be good team building. If the challenges involve each other or an adjacent manager or something though even 5 minutes could get mean spirited quickly.