Earlier quoted context omitted.
When I lived in Japan twenty years ago, everybody just wired money electronically and checks were long obsolete. In the US, I write checks every week or so. They also had a system where you would put your checkbook into the teller machine and it would print your credits and debits into the book for you. It was very convenient. On the downside, the ATMs were turned off (!) during national holidays, so you had to get c…
Surprised you're writing checks every week: I haven't written a check in years. ACH transfers, sure, but not physical checks. I do still receive them occasionally, almost always as printed checks from companies.
By this I mean, in the US everyone could use CashApp, Venmo, PayPal, Zelle (glorified ACH, right?), etc. for p2p payment. If you have the same bank, many banks have a trivial "send money to another customer's account" feature. However, to do so requires essentially a 'handshake' where the two parties agree on a method. Checks require no up-front handshake, since everyone knows what to do with a check (deposit it at your ATM, take a picture of it with mobile app, or take it to a check-cashing place or the issuing bank).
If I could print on paper a key or QR code that allows you to claim the money into the account of your choice, like a check does, I'd use that. Sadly, banks seem to have put their effort into Zelle instead.