Personally I think the "Spirocore lasts forever" talk is hooey. Yes, they last longer than most strings, but I've played plenty of examples of dead Spiros over the years. When I used them myself I felt they were past their prime after a couple of years. They still had clarity and sustain, but had lost much of their their brightness and punch. Plus they felt yucky.
- Steve
It's interesting that you can feel strings die, but I totally relate to that. I will say that Spirocores don't seem to hold up as well in the pegbox as most strings for some reason, maybe just because people take them off and put them back on more than most strings.