I am smugly sitting on quite a few consumables likes cables, cassettes and chains. Mainly it is because I bought them when they were bargains. It was great when it was normal to pay 50% of the retail price on Shimano and you could find some real bargains at 70%+ off. I get the impression that supply won't change for quite a few months, certainly my LBS are having issues and have been given no new timeline. They were lamenting that for a while they could not even find 26" tubes and had to resort to patching customers tubes - I don't think that has been fully resolved yet.