It’s done a bit. Last big one was swapping out the Bonhomme Richard for Essex as the forward deployed LHD in Japan. Couple years back, I think.
Used to happen quite a bit with the old Sprucans as they were being retired.
Never with CVNs tho. But the costs of moving families between coasts and overseas is probably a lot more expensive than retraining on particular ship differences.
Anything out of the normal perks my ears up these days.