Practically speaking, many camper vans offer less day-to-day living space & something that is often overlooked, is the available standing room when the bed made up.
Many campervans leave no room for standing, so once the bed is made, so you'll be making the coffee on your knees and pulling your jeans on laying down! Certainly not great for the back at all, especially on longer trips.
Go-Pods offer a convenient standing area even when the bed is made up. You can cook a meal, make a hot drink & get dressed all while standing comfortably. Even the loo can be used inside - making all the difference to convenience & ease of use.
From a comfort perspective, a camper van’s rock n' roll bed systems can be bumpy, small & not as comfortable as the Go-Pod's totally flat, king size bed platform, complete with it's 10cm foam mattress for a proper nights sleep.