What do I do with transparencies?
Well, I have maybe the top 1% printed , and I find it much easier to evaluate the qualities of a transparency, and to choose betwen close similars, than with a colour negative or a a proof that no-ones going to colour -match perfectly and so may not look much like what I'm going to get using a different print method for my larger prints. Then after, I find it easier to assess whether my printer has done a good job.
I show some to my library, who I'm sure respond to transparencies on a light-box better than they would to a pile of proof prints. I project some, for myself, for photographer friends and the odd society.
I'm not at all sure with todays printing methods that you lose much from the tranny anyway, though since my prints are made on Crystal Archive its possibly a bit difficult to tell what the source material is.