Hi neighbor,
Only two "recent" model from nikon can scan 6x9, it is LS-8000 and 9000. They had a very old model that can handle even 4x5 I think but so old and so rare.
the 4000, 5000, V... can scan 35mm or aps film with a adapter. If you need to scan medium format and you are on a budget, you better find a flatbet, like epson v500 or v600.
But I assure you that for 35mm, this is the best you can get beside drum scan. Or maybe some people find the minolta 5400 better, but this is close to what is best for 35mm.
Here you see that a comparaison of flatbed vs dedicated desktop film scanner. I came to this site because I was looking for a flatbed for 4x5. Drum scan is affordable on ebay, but they are huge, some need 240v, some even need their own plug. Not a regular electric plug.
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clearly, the 35mm is better. Also for scanning 35mm it is better to use this scanner as it keeps the film very flat compare to a ls-8000. The film on the ls-8000 or ls-9000 is put on a plastic adapter, the film is not totally flat. With this scanner the film on the feeder is very flat, since it kinda pull the film. Anyway that my experience.
good luck