I don't mind when there's physical menus but people saying that they would leave the restaurant when there's not is crazy for me, menus are a waste of paper and ink.

I'm more used to either PDFs that are updated once per year (and the restaurant usually has a bunch of physical copies, but not enough for everyone on peak hour and that's completely reasonable) or webapps that have the regular menu where they can strikethrough sold out items so that it's easier for customers to notice, add dynamic items like "the fish of the day", or even being able to click each item to get a preview image.

I agree that having prices be updated every hour/minute day according to demand is incredibly scummy and completely inexcusable, and restaurants that do those things should be boycotted, but that's a separate from the menu digitalization.