Yes, it is still worth having a Preservation Box. Even if you're a player who doesn't invest time in opting for high-quality consumables to survive, you're aware that you can still survive by using the most simple ones even if they may not be the best, as they will still help you going places. During your journey, you'll collect a wide variety of things (consumables and other items) that you may eventually need to level up your character or improve your base. Storing items ahead is convenient, but having some of those items stored for a long time can spoil them. Replacing spoiled or missing items can be a hassle, so the Preservation Box plays an important role, no matter the rarity and quality of the items you need to store. You can keep stacks of meat, berries, and other things inside a Preservation Box and never run out of food or other items so fast anymore. Also, if your Animal Pen is busy raising an animal, you can put other animals on "hold" in your Preservation Box so they won't decay in the meantime, for example.