With the 007 being such a good car, I suppose there's always the chance the new car could be a step backward in some people's minds, sort of like the 05 to T2 transition.
As much R&D as XRay does, I can't imagine that would happen, but who knows. If they purpose-build the car for 5 cells, I suppose it's possible it could affect people that still use 6.
I still read comments now and then that people liked the FK04 the best.