How Long Does Synthetic Rigging Last?

I'm starting to use Dyneema more and more. I like the ease of use, economy, and the light weight.

But just because it is corrosion resistant and fatigue resistant does not mean it lasts forever. 6-8 years is safe in the tropic and probably 10 years here in Maryland (less sun), but I've seen older Dyneema break, and the remnants tested at only 25% of new strength (probably quite old, but not known). Same with lifelines; nice for 6-8 years, but after that it depends on how over-strength you went.

Just make sure you put it on a schedule, and like any rigging... inspect it!