In theory, a device that creates a video game-type save-point in real life and lets you do whatever you want without consequences sounds like a lot of fun. In practice, it wasn’t, since Rick specifically designed it to torture Morty and teach him a valuable lesson about consequences never daring to criticize Rick’s cool-ass ideas, especially if they involve fake vats of acid. In the end, that was the device’s only practical purpose: #$%@ing with a specific 14-year-old’s head.