Say Alice wants to send money to Bob. She types his bank account number and bank code into her bank's online banking website. And it's free. She has a regular account, so she pays somewhere around $5 per month for that and nothing per transaction. She could also opt for no monthly fee and $.25 per transaction, but since rent, utilities, insurance, groceries, etc. all goes through that account, she's better off with the former. So the transaction is free and it is non-reversible, once sent it can only be refunded by the payee. Sufficient funds are checked before the transfer is initiated by the bank.

Now when is this going to be a reality? Wow, this has been actually possible for the last 28 years! In a far away country called Germany. And even if you didn't own one of those fancy BTX terminals back in 1983, you could send money on a slip of paper, also free of charge or with a small fee. And what's a check (or cheque)? I've only once got one, in the late 1990s. It felt ancient.