Especially doing anything that requires one bank to talk to another. Why does it take 5 days to move money between banks? It's ridiculous. I once had mistakenl

Especially doing anything that requires one bank to talk to another. Why does it take 5 days to move money between banks? It's ridiculous. I once had mistakenly setup a transfer from one bank to another and I wanted to cancel it. So I called up the destination bank and they said there was nothing they could do. I called the source bank and had to pay 30 bucks to put a stop payment order on the account AND they couldn't guarantee it would stop the transfer.