I believe it depends a lot about how much photographers use the tri-x emulsion.
it's the same thing with movie-only stocks like 03, the larger format uses dominate how the emulsion will survive in the market because those shooting it in 35mm or 65mm use it A LOT more than those shooting 16mm or super8. If all the cinematographers would stop shooting the 03 on 35mm and 65mm formats they would surely discontinue it right away because there is not enough sales if they slit their master rolls only to 16 and 8mm formats.
if one would have a camera which would use 20 or 30cm wide film for extreme high resolution movie use they could maybe keep a stock alive with a single camera or two and maybe even get Fuji back to the market again
Edited by aapo lettinen, 20 October 2015 - 05:32 AM.