This is a timely question/topic.
I rummaged through the garage freezer that holds my film stash. I knew I had some slide film in there, but didn't realize how much and how diverse. Several rolls of Fuji, Kodak, and other brand slide films (almost all 35) in speeds ranging from 50 to 400 (maybe a roll of 640 or 800 too?), mostly daylight but some tungsten too. Its all E-6, I gave all my Kodachrome to an RFF member (Sara) a couple years ago.
These films have all been frozen all their lives (a few rolls spent some time just refrigerated). They are all quite out of date; mostly from the 1990s, a few early 2000s, a couple from late 80s? I'm not likely to ever shoot slide film again, what do I do? If its still good-ish, I'd sell it for cheap. If its going to be bad, perhaps it would be better to toss it than make someone unhappy with me.