The convenience of digital simply made cash useless (mostly).
The convenience of digital simply made cash useless (mostly).
Useless? Wait until your digital transactions fail or your bank or your state decides to block your access to your payment system. And believe me, it's not a "if", this is a real threat that will be waged against people. When it's technically possible, it always ends up becoming a reality. And by that time, "going back to cash" may not be an option in certain places, because of 'convenience'.
When you live in an authoritarian state with arbitrary law 'enforcement', the problem isn't the payment system that you're using. It's that you no longer live in a country of laws.
And that's not a problem that's going to be solved by using dead tree money.
The point is that a lot of restaurants used to not report a lot of cash transactions.
If almost everybody is using digital, the restaurant no longer has the option to underreport as there is an indelible transaction record (generally with an outsourced third party handling your credit cards).
So, some amount of the "productivity increase" is simply the underreported cash transactions now coming onto the books.