Interesting question. I have old film, including two packs of film. One for 6x9 and the other for 9x12. One is unused, the other partially used. I have been thinking on that. I think I will keep the unused, and finish the other.
I have much Kodachrome 25 and 64. I haven't decided what to do with it. I know I can use it as b/w, but why? As mentioned, there are fresher films available. The boxes aren't in the best of shape.
What to do? I am watching the replies here closely.