I get this to a point but food is trendy, similar to fashion. If something is popular, people are going to want to eat it as much as they're going to want to wear it. I don't begrudge restaurants from offering things that people want to eat.

Thankfully, many places have an incredible diversity in the cuisines offered. Yes menus at Italian restaurants seem to be similar, and not very old world Italian at that, but having so many different cuisines to choose from doesn't seem like a rut to me, and is a vast improvement over the offerings of a generation or 2 ago.