For a few reasons: 1. Pizza travels very very very well 2. Pizza is pretty cheap to make 3. Wages (and costs of transportation) were lower 20 years ago. Mor

For a few reasons: 1. Pizza travels very very very well 2. Pizza is pretty cheap to make 3. Wages (and costs of transportation) were lower 20 years ago. More generally, delivery as a model can work, but not when you have an organisation of really expensive engineers/salespeople working on a frontend to it.