A while back I googled the number of transactions per second for the various types of payments in the US, and it came to less than 100K tx/sec, including credit

A while back I googled the number of transactions per second for the various types of payments in the US, and it came to less than 100K tx/sec, including credit, debit, cash, checks, wires, and ACH. Rollups on Ethereum today can handle a couple thousand tx/sec, and the sharding system they have planned will boost that by about a factor of 200. These systems are somewhat centralized for block production but fully decentralized for verification. Having had to spend time more than once physically visiting bank branches to send wires, or wait for days to get checks to clear from one bank to another, I'm not convinced that today's solutions are all that impressive. They don't exactly seem simple, either.