We cook breakfast at the outdoor kitchen every morning. Don't want bacon or sausage grease splattering the inside. We cook tacos or italian food outside too, because we don't want the smell lingering inside as we try to sleep. With the kids, the outdoor fridge was great to keep drinks so we didn't have to open the door and potentially wake kids during nap time if parents were thirsty, and we didn't have to constantly go in and out when kids needed fruit snacks or drinks.
We initially thought it was a gimmick and planned to take out the fridge and cabinets and use it as storage, or maybe hang a tv inside for outdoor entertainment... but we LOVE it and couldn't imagine being without it right now.
We usually camp with a group of friends, so preparing meals can be a social event, rather than being stuck inside the camper and isolated from everyone.