I think the reason is in great part because of the huge prevalence of slow-speed zoom lenses that practically required faster film. Had Kodak wanted to improve slower speed emulsions they could have. The money, however, was elsewhere.
Shel > [Original Message] > From: J. C. O'Connell > > I believe the reason that the recent Kodak 25 speed emulsions > were discontinued was they were able to make signifigant improvements > in the 100 emulsions to the point that the 25 was obsolete and they > were unable to make the corresponding improvements in the 25's so > goodbye 25. The films that came out at same time of 25 ending were > gold 100, royal gold 100, and supra 100. I think the current film > "Bright Sun" (100, damn tacky name). is most likely as good as any > 100 they ever made and probably matches those old 25s too.

