Solana mainnet was shown to have capability to handle 100k transactions per second [1]. Granted, it was a synthetic benchmark of noops, but it shows the capability is there. For reference, Visa claim 83k TPS [2] for their system. It also has the advantage of being vastly cheaper than tradfi payment networks at ca. $0.0005 per transaction [3] irrespective of transaction amount, unlike the big three credit card networks who charge 1-3%.

[1] https://www.coindesk.com/markets/2025/08/18/solana-briefly-h...

[2] https://corporate.visa.com/en/sites/visa-perspectives/securi...

[3] https://solana.com/learn/understanding-solana-transaction-fe...