When everyone has a phone in their pocket, this would be a folly.
In Malaysia, it’s common for the menu to be entirely digital - you scan a qr code, and you’re then presented with the menu, from which you then order and often pay directly on your phone. Some places remember who you are and show your previously ordered dishes at the top of the menu.
There was an uptick in this behavior during covid in American restaurants, but everyone I know expressed dislike for it. I agree it's more practical, but I thought my suggestion was a nice way to hedge engrained customer expectations against a desire for digital advancements.
I think there’s also a basic QA issue. I use that heavily at places which have systems which are fast and reliable but most of the places which stopped had these terrible systems which wanted you to install their low-quality app which demanded lots of permissions and account creation, or seeming-parodies of modern web apps which needed 25mb of JavaScript to display a menu (not hyperbole - I checked one of them in WPT after being surprised by how bad it was).
Unfortunately, I think a lot of restaurants drew the conclusion that customers don’t want online ordering rather than that customers want fast and smooth ordering. I suspect some of that was also unrealistic expectations from the ad-tech industrial complex promising additional revenue from things customers don’t want, too, based on how aggressively some of those pushed you to create accounts and allow tracking before you could order anything. Someone not blinded by greed would make the pitch to do that kind of thing after ordering when you’re not trying to do something else and have an idea about whether you’ll even want to come back.
In Malaysia, it’s common for the menu to be entirely digital - you scan a qr code, and you’re then presented with the menu, from which you then order and often pay directly on your phone. Some places remember who you are and show your previously ordered dishes at the top of the menu.