Interesting points, Sian,
It could be argued, also, that by setting criteria for judging the intergrity of the tradition is upheld.
Does innovation have to artificially accelerate? Surely, for any tradition to continue there is a degree of innovation and adaptation to suit new contexts. I agree that innovation for its own sake, or worse still, for economic reasons, is possibly detrimental to the health of the tradition, but commercialisation of traditions does also make them accessible to more people, for whom they might be relevant even if they had not discovered them by traditional means....thinking aloud here!