I’m not sure if the VS A333s are the bees knees 251T MTOW variants
I believe a couple of them are. Not sure of Reg's, but they are used on the likes of MAN-SFO I think.
VS have already recently taken at least 1 A346 out of storage for the ULR routes.
One of them (I think VNAP?) was on a test flight over SW UK yesterday, out or Lourdes IIRC
I see there is now also a thread running (R&N) concerning some turnbacks and groundings for Air NZ on RR-powered 789's.