Exactly what I always proclaim. I'm loyal to my team, to my coworkers, the living beings, not to the org chart that pulled them together.

(Another thing I keep repeating is "You are not your job".)

I agree. Tenures may be short but careers are long and tech is (surprisingly) small. Credibility builds trust and trust between people is ultimately what business run on. "Do right be people" is a good strategy.

Only in moderation. When employees start forming cells inside the org things quickly become toxic.

conversely you don't quit bad companies, you quit bad managers

Good advice. The company gets your loyalty as a side-effect