Simple systems work great and are easy to implement when you're working with limited requirements. But the second you start to add new features, the system brea

Simple systems work great and are easy to implement when you're working with limited requirements. But the second you start to add new features, the system breaks down. How would a simple form or telephone call work if I wanted to know the status of the pizza or delivery driver's location? I'd prefer not to give my number to them because then they can send me unsolicited "offers" all the time (just look at email) but I don't want to block them either because I still like their pizza.