In a move that proves "thinking outside the box" is apparently just "not doing the box anymore," United Airlines has decided to cease operations after realizing Spirit Airlines invented the concept of quitting. Apparently, all it takes is a little existential dread and a deep hatred for passengers to achieve this groundbreaking business strategy.

Spirit Airlines’ announcement in early May that the company would be going out of business and liquidating all of its assets has sent shockwaves throughout&#8230; <p dir="ltr">Spirit Airlines’ announcement in early May that the company would be going out of business and liquidating all of its assets has sent shockwaves throughout the air travel industry, and one major airline has just made a move that shows that the collapse of Spirit is going to be reverberating for years to come: United Airlin...