CTarian on Nostr: For a restaurant owner, could it be as easy as just having a bitcoin wallet on your ...

For a restaurant owner, could it be as easy as just having a bitcoin wallet on your phone? I understand the time it takes for a transaction to happen, but couldn't the business owner just request the patron pay half way through dinner by sending BTC to the owner's phone? Heck even if each waiter/waitress had their own phone, the restaurant bank account wallet could be on all of them, couldn't it? All could reconcile at the end of their shifts.. The tech is there now to set up a central account too.. Seems this would be so simple. Someone just has to take the plunge.