Well, actually, the image stability improvements moved from color paper (which drove image stability for years) back to MP print films and camera originals for archiving the original color footage. You see, the archiving of digital images became very difficult and expensive. You will see that both EK and Fuji have come out with new archival MP films.
Also, Fuji's contribution to MP was miniscule compared to EK, but in terms of their overall production it was large. EK was by far the biggest supplier.