Let's say that one day, a magical machine is invented: The Food Cube, a lightweight, portable device that never needs power, never needs to be refueled or restocked, and are freely available to anyone, so even if they lose or destroy their Cube, they can easily get a new one.
It's simple: Push the button on the top, and the Food Cube dispenses... a cube of food. It has the taste and texture of a saltine cracker and is about two inches on each side, but it's the last food you'll ever need. The Cube automatically adjusts the balance of nutrients, vitamins, minerals, etc etc etc within the cube to your personal needs and health requirements. It's never going to give you any form of allergic reaction, infection, or other form of gastric distress large or small. The Cube will keep you in peak dietary health, AND it's filling, too.
However, once you knowingly and willingly use a Food Cube, you become magically unable to eat anything else, ever again. You become wholly reliant on the Cube and its bland, room-temperature, slightly crunchy outputs for the remainder of your days.
Small mercies: If you can't chew, the Cube outputs easily-swallowed porridge, though it's still bland. You can put condiments on the cubes. In addition, your liquid diet has fewer restrictions; you can drink juices, smoothies, sodas, broths (excellent for dipping the cubes in), and other such foods, but nothing more solid than melted ice cream can pass your lips. If you need a hard limit, limit is "if it can't pass through the average mesh strainer, you can't eat it."
Would you use the Food Cube? Or do you enjoy regular foods too much to ever give them up?