The "Gigablock Initiative" presented at the recent "Scaling Bitcoin" conference tests exactly that. They found that Bitcoin Cash can easily scale on chain to VI

The "Gigablock Initiative" presented at the recent "Scaling Bitcoin" conference tests exactly that. They found that Bitcoin Cash can easily scale on chain to VISA levels using standard desktop machines. https://news.bitcoin.com/bitcoin-unlimited-reveals-gigablock-testnet-performance/ https://news.bitcoin.com/bitcoin-unlimited-reveals-gigablock... The same would apply to Bitcoin scaling on chain.