Much as I adore Vanna, I cannot help but wonder why she is still needed anymore, other than to make the puzzleboard look less barren. Clearly the puzzleboard can operate without her. For one, the toss up puzzles fill in automatically without her doing anything but "touching" the last letter. For another, when Vanna filled in for Pat, during one Disney themed week, Disney "magic" filled in the letters while I believe Mickey and Minnie Mouse were just standing at either end of the puzzle board and would wave their hands whenever a called letter appeared in the puzzle.
I do not know about budget concerns for future seasons, but to me, once Vanna retires, I do not really see a need for a new hostess. I admit I am not a huge Wheel watcher like I once was, but will still occasionally watch. Does Vanna still model any prizes? If so I imagine it would only be automobiles.
All this said, I do not want Vanna to retire any time soon, and if the show is still on once she decides to retire, I'd be okay if Maggie Sajak takes over. It saddens me that Chuck Woolery never got to appear on the show after Christmas Day 1981. I know Susan Stafford, the original letter turner had filled in once I think when Vanna suffered a miscarriage. It would be nice if Wheel did an "old home" week some day, filming at the original NBC Burbank Studio and to have Susan make an appearance somehow...sadly Merv, Chuck, Jack Clark and Charlie O'Donnell all have passed. Would be neat though to have perhaps Susan play for one episode against Rolf Binirschke and Bob Goen for charity during one of the "old home" week episodes. (sorry I went off on far too many tangents)