If blockchain pruning is implemented is there a theoretical upper limit on the blockchain file size?
My thinking is something like with "pruned" blockchain you only store the details of the unspent bitcoins, so even if every satoshi was sent to a unique address then the file to store this information would have a finite upper size limit. Is this correct? And ballpark what file would the file size be?
If there is a reasonable upper limit and with likely continuing reduction in storage costs (i.e. Kryder's law, similar to Moore's law but for storage) then the criticism about the size of the blockchain file may become irrelevant.