200MB blocks would lead to a >100x increase in size of the blockchain compared to the 1.6MB blocks we currently have, putting it at around 100TB.
Of course that would significantly reduce decentralisation - instead of a standard 1TB disk to run a node, you'd need 100TB! of storage space, without even considering the download.
Then you've got the increased bandwidth necessary to run the network which at the moment can even run over ham radio if necessary.
And even with those massive compromises, it would still be slow to confirm and could in no way compete with Visa/Mastercard.
Of course that would significantly reduce decentralisation - instead of a standard 1TB disk to run a node, you'd need 100TB! of storage space, without even considering the download.
Then you've got the increased bandwidth necessary to run the network which at the moment can even run over ham radio if necessary.
And even with those massive compromises, it would still be slow to confirm and could in no way compete with Visa/Mastercard.