I didn't read all the responses but this seems like an absolutely silly question. I'd expect better from you Eric ;)
When you're developing a route, you end it where the rock dictates you end it - not according to your rope length. That can be the top of the cliff, a belay ledge, a finishing "jug" or "foothold", or maybe the climbing gets dramatically harder, easier, or chossier... end it there.
If the pitch is longer than your rope - be it 55m, 60m, 70m, 80m, or longer (or two ropes tied together) and you need a way down, then add a lowering/rap station. It's not on you if someone brings their 60 and does a 35m pitch, lowers off the end and breaks their back - regardless of what you choose to write in your guidebook.
By Ryan Williams Administrator From London (sort of) Mar 22, 2014
Craig Childre wrote:
70's will be the ceiling IMO. Longer cord will simply weigh too much for vertical and above, and create too much rope drag on off vert and slabs. The newer slim lines can offset these drawbacks, which is why I think the 70 has become the new weapon of choice. I utilize my 70's extra length mostly rapping down and not for leading long pitches.
There are already plenty of crags in Asia and Europe that require 80m ropes. Ceilings are not healthy.