NFTs don't solve the actual problem, which is that paying money doesn't legally come with a warranty for accessability of the thing you bought. The law should guarantee the right to access anything purchased or marketed similarly for a given period of years with the right to either a Refund or a DRM free download option if said access is no longer offered for any reason, and mandatory cultural preservation of said media as a precondition to legally profit off of it or enforce copyright using the court system