Outdoor gearheads (bikers, skiers, surfers): Frees up vertical storage for bikes, boards, etc.
People with lots of gear or mobile business setups: Room for drawers, storage bins, or work benches underneath.
Full-time vanlifers: Want the option to maximize living space when not sleeping.
Tall people or those who need a full-size mattress: You can often have a proper mattress since the bed doesn’t need to split into cushions.