DISAGREE....I have 16 ROO´s now and I had over 24 of them last year....only 1 of them failed twice (RB2) and that was also after a proper service and graphite treatment and gear-correction, so you´ll never know.
I take the road of "wear-untill-it-dies" and so far I almost never happened to see one of my babies dieing (OK OK, with so many ROO´s at hand I exchange my watches every day and don´t wear a single pice for longer than 2 weeks in a row ).
Anyway, why should I get new soles on my new shoes before it´s really necessary?
Only my 0.02$...cheers mates,
Theo