When I got into shooting in the 1970's, the 8-3/8 inch barrel was THE one everybody wanted. 4 inchers, especially .44 and .41 Magnums, tended to sit in dealers' displays longer. This seemed to be because the common uses for them were handgun hunting and target shooting. Concealed carry wasn't much of a consideration back then as so few jurisdictions permitted it.
Now, the shoe's on the other foot and everybody seems to want the shorter barrels more.
This seems odd with the big guns, as hardly anybody makes a habit of consistent concealed carry with N frames. A lot of people have tried it, but my guess is people like to have the capability but not actually use it.
Nickel isn't really popular here. I got a pretty good deal on my nickel, 8-3/8 inch Model 27-2 because the dealer was tired of looking at it!