That's true, but the more resilient they can be made the better. I know at first they were talking about potentially reusing them 10 times each and now they have successfully demonstrated that they can do it 20 times each instead. So perhaps with some extra maintenance work and some inspections they could get it up to 30 or 40 times per booster. There would obviously become a point where maintenance would cost more than just building a new booster at which point they would obviously start retiring boosters and making new ones to replace them instead of reflying them.

So they should have only flown this one 22 times? How do you determine the best "before they fail" point?