In reply to IainWhitehouse:
> (In reply to HeMa)
> [...]
>
> Really? And you have conducted extensive testing to prove that I assume.
Yes, sort of. See below.
> It is a very common asumption but has almost no basis in real use. Most ropes get worn out through simple wear and tear. Very few people fall off enough to have a serious imapct on the ropes life. A better indicator of wear for most normal people is the proportion of sheath.
Funnily enough, my climbing club has retired a few lead-ropes since they were not elastic anymore. The sheath was fine as was the core, but lead-falls onto those ropes started to get painful. Not really a good thing for lead-climbing course participants.
And as those ropes were mostly used for lead climbing (practice), quite a few small falls were made on to the rope. Interestingly enough, as some of the ropes were a different brand (and also rated for different number of nominal falls), the ropes with more falls have proven to last a lot longer (and yes, they were bought during the same time and used about the same amount).
So, at least from my practical and tested opinion, the higher the fall number, the longer the rope lasts.
Naturally, if you climb on really rough medium and generally fåckup building anchors, extending your QD's and whatnot, the sheath is going to wear out faster than you have time to fall on it.
Should be noted, that those that mainly clip bolts actually notice how the elasticity dissappears after numerous falls. And you're adventure-climber very rarely falls, where as it's really common with bolt clippers.