I think it depends on the restaurant. I've seen plenty with old non-NFC POS terminals and bespoke Windows 3x/9x-like UIs like you've mentioned that continue to

I think it depends on the restaurant. I've seen plenty with old non-NFC POS terminals and bespoke Windows 3x/9x-like UIs like you've mentioned that continue to work day after day. And I've also seen more modern restaurants using nice wireless Square terminals with clean associate facing interfaces. Probably just comes down to cost/benefit/training/setup etc.