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At my age my phone is too small sized for me to be able to view a menu properly.
Now if they want to loan me a tablet to review the menu I'd be fine with that.
Regardless of age, I think you could probably argue that the small, glowing rectangle in your palm is an inferior reading and dining experience compared to an actual menu.
That's not even to mention the unholy abomination of a tech stack that a system like this would be— Camera, QR decoder, web browser, WiFi/cellular, their web server— That signal might travel hundreds of miles to your ISP, their host, and then back— Probably a couple layers of outsourcing/contracting/helper apps they used to set it up— Though it's apparently normal to take all that for granted these days, it's still sorta ridiculous.
Don't forget propably relaying on old IPv4. ICANN domain space and DNS, IANA addressing space...