Wouldn't it be more detrimental to a team's performance to hire someone who isn't a cultural/productive fit? I think that would make the temporary performance hit when hiring worthwhile.
Exactly. A good hire will add thousands of hours of productivity. A bad hire can be negatively productive, either personally, by harming team performance, or by driving off productive people. Trying to minimize team-minutes spent per candidate on late-stage interviews is a false economy.
In practice, I don't try to get absolutely every team member involved, just a quorum. If everybody wants to have a say, that's fine by me, but often once you get past 3 participants somebody will say, "Oh, whatever you folks think is fine by me."
