Anyone who owns a house? I just wrote one the other day: after a rainstorm we had a water leak and I paid the water mitigation contractors with a check. So far I haven't seen any contractors carrying Square Readers.
FWIW It's not very streamlined in the states. I once needed to accept a wire transfer, and it was rather difficult. I ended up needing to open a new one-off account at an entirely different financial institution to do it.