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Probably not but we all have accidents! A little water missed on the bevel could = rust.

An inability to refresh your razor on a strop, on your finisher, on one of the lower level stones in your progression. The bevel needs to be set.
As well as a plethora of other issues: pitting,...

I've got... 9 stones now and just pulled the trigger on a vintage coticule. When I get tired of a razor or just want to pass it on, it's nice to give the person an 'option' of which finisher you use...