Reusing stainless spokes that have always been highly tensioned never seems to be a problem, as Jobst Brandt's book says. (About cracked rims from spoke tension: I seem to remember that DT catalogs referred to straight 14-ga spokes as "tandem gauge," which seems to imply that you use them with lightweight rims at your own risk.)
However, when you remove all of the spokes and then go to respoke a used hub, you should be careful to rebuild the hub with the spokes in the correct holes: leading spokes must go in leading spoke holes and trailing spokes in trailing spoke holes. Back in the long-vanished Campy lifetime warranty days, a Campy tech told me that for warranty claims involving spokes riipping out of hubs, the first thing they would do is look at the hub flanges. If the hub had indents on the flanges showing that holes that had previously been used for trailing spokes had been reused for leading spokes - no warranty.