I think shelf life of line depends on the brand..I've had Berkley and Stren both last years when stored in a cool, dry, unlit place. I had a spool of Cabela's line stored the same way, and I respooled with that stuff and consequently stripped it off after my trip because it for sure lost some strength. Minor snags would break knots, and the cope de grace was when I cast a 1/4 oz spoon and the damn thing snapped off. It HAD to be the only Hopkins spoon I had, too
Not sure who made that line, but I was sure disappointed.
Good idea about that Cajun Red line..