Delta’s flight attendants (and a few other groups) aren’t in a union.

This has left Delta very motivated to make sure their flight attendants are happy so that they won’t unionise.

The end result is better workers, happier customers, and more productive workplace. But this wouldn’t happen without the threat of unionising hanging over Delta’s head.

I personally think a good outcome in situations like Apple is having maybe half their stores union, half not - Apple would be very motivated to keep the non-union employees happy. Customers could end up seeing which stores work better. A competitive marketplace, if you will.