The times I found XP unworkable in the real world all fit the scenario of "We're doing XP, but not pair programming because that's silly, we don't do x and y ei

The times I found XP unworkable in the real world all fit the scenario of "We're doing XP, but not pair programming because that's silly, we don't do x and y either because those are impractical." The few projects that fully embraced it worked surprisingly well.