> But when 6 people simultaneously tried to pay their share of the bill, chaos ensued. Hasn't that been a fact of life ? If anything, apps made it barely made easier through splitting either the whole bill equally or offer a bit by bit checking interface. Otherwise on the role of QR codes and online menu, it actually helps a lot for allergies as everyone can check their for each individual item and adjust accordingly…
I was a bit surprised by the way the payment is being made here. Do people pay it separately like this? In general, if it isn't a prepaid restaurant, then just one of us makes the whole payment, and we pay our share to that person. Don't people follow that generally?
For example in Germany, splitting the bill is pretty normal, to the point where restaurants are adapted to it. Since this process adds some friction it is, however, also the case that someone will pay for everything and split afterwards (or variations on that theme).
Newer payment systems seem to have made that easier (e.g. mobile devices that allow waiters to initiate the payment for a subset of what a table had and allow for contactless payment). The older variant of that is the waiter going with you to the cash register that basically allows them to do the same bill splitting. The even older variant is the waiter breaking out paper and pencil and doing some addition (though I seem to remember waiters actually being annoyed if they had to do that, not so with the new solutions).