If I wire 200k to buy a car, I want that money to arrive instantly. I certainly do not want to spend hours at some parking lot waiting for the money to arrive, I want to sign the papers right there and then and take the car with me.

No fucking way I’m gonna leave some random with both the car and my 200k. So instead of sending a bank transfer, I still have to show up with a big bag of cash in 2022.

The amounts where multi-hour transaction times are consistently acceptable will be significantly higher, 200k is still well within normal everyday p2p transactions.