I say yes. Make it small and light with a higher megapixel sensor and the Expeed 7 processer and the latest Nikon AF. Would it become a favorite of birders and wildlife shooters like the D500 was? The Z50 is 4 years old. It seems like Nikon has abandoned crop sensor cameras. Should Nikon instead just produce a very high megapixel full frame body which can be shot in DX mode when more "reach" is desired?
I have been satisfied shooing a 45 mp Z9 (same would go for the Z8) in DX mode when more "reach" is desired birding.
I have also enjoyed shooting a Z50 with the 18-140 zoom as a very light walkaround camera. This combination is very easy to carry and not really limiting for general photography. Here are some Z50 18-140 RAW images taken on this morning's fall walk and processed through Nikon NX Studio. Click through to flickr to see better. What do you think? Is the Z50 outdated or still fully usable?