Sadly, you are correct. It used to be that prices didn't change that frequently and a printed menu would not be too much overhead. Now, prices are changing so rapidly, it's a non-trivial cost associated with printing new menus every time the price changes.

I think digital menus are accommodating of the restaurant owner, in this regard. But they sure suck for customers, or at least, for this customer.

And remove things if they're sold out, easily add specials etc.