For those who fish a lot, perhaps also have kids that fish a lot, employ 5 to 8 rods (or more!), and like to freshen up their line fairly regularly. I typically reline at least seasonally after prespawn, spawn, summer (usually at least twice), and fall, copolys/super monos offer such a price advantage over fluorocarbon.
I agree that memory is the most tolerable aspect of a given line. Defier Armilo wasn't exceptional in the memory department, but amazed in the strength-to-diameter and abrasion categories. On evaluating strength-to-diameter / abrasion, with most copolys that tend to have slightly larger diameters, we are forced into buying a power down (i.e. evaluating 10lb copoly v 12 lb traditional monos) and seeing if the line over delivers on strength to make it a wash. My concern so far has been how this relates to abrasion resistance. If the strength is there, but the smaller diameter compromises the abrasion resistance, I may turn back to Sensation. I think that it's just hard for me, at 52, to accept that the line technology I fished in high school/college is the line I should throw in 2025, especially after discovering Defier Armilo, which "was" (discontinued) the only running-away better option I've found.
My hope to evaluate coploys that have smaller mono-like diameters is probably just laziness. It is absolutely plausible that a larger diameter copoly can be bought in a lower pound test and outperform a larger standard mono in BOTH strength and abrasion resistance. I think that for people who reserve braid for spinning and heavy vegetation, don't fish a lot of clear water, see fluorocarbon as decisively better than low-stretch coploys, or just don't want to tolerate the expense of FC, this is a very worthy discussion. Thanks to all