> all the "convenience" of online menus goes away when a waiver has to bring their book of allergens to the table and manually take the order anyway.

Which is silly because an online menu is an amazing opportunity to do extensive dietary restriction support. In fact, it's so accomodative to have a filter to narrow/highlight menu choices that I'm surprised restaurants haven't done that and also made "Paleo" and other diets part of it. Plus every single menu entry could have expansions to show exact ingredients, etc., for extra research.