Few and far between! You must be joking. Every week we see crews on "one out one back." Took some crew to Zurich a few days ago - one out one back. Todays crew - one out one back. We do a Lyon standover so we can operate the v early departure then finish with Algiers there and back. Guess what? Crew usually on one back.
And yes it is our business if outdated, inefficient work practices are costing our employer millions and endangering our livelihood.