It was a time when prices weren’t fry-way robbery. Once an oasis where the cash-strapped could eat on the cheap, fast food is rapidly becoming a luxury that people splash out on for special occasions.

It’s a huge celebration for Chick-fil-A and it’s all due to the fast-food chain marking 80 years in business. It’s a monumental milestone for the franchise, and there’s a big opportunity in it for the ...