I do wonder how this effects accessibility. What if I don't have a device with me? What if I have a disability that prevents me from using a device? Seems like this might be an ADA compliance liability.
I am guessing you then ask for a paper menu and they give you one. You can probably just do that even if you don't have any issues. I've done that a few times when the online menu was annoying.
With two competing channels, we won't have to wait long until one becomes an afterthought. I personally hope that QR codes (or whatever requires to use a smartphone) will be the one going the way of the dodo.