I feel that. I can't stand this crap and I get you wanna save paper but some of us don't bring phones everywhere we go or we just have a flip phone or a phone without service. If you really wanna save paper instead of using more paper to print out a QR code just get a chalkboard or whiteboard
It would be nice if this was about saving paper but a website is being powered and that likely isn't a good ecological trade. You could say it's easier to change prices but it's also easier to track you; your browser cookies are like a membership card.