I know - I was just pulling your leg!

The fraying is a valid point, and worth mentioning, but I still hold by the view that if the initial adjustment (on installation) is done correctly, there won't be a problem. What happened in the case of fraying I've seen, is the set up was not quite right to start with, the cables rubbed, then realising the clutch was getting a bit stiff, were readjusted to get the alignment right. By this point the cable strands will have been weakened or started to fray, and once they've started to go there's no way back, even after readjustment, lubrication and correct alignment is achieved.

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