Sliding doors without a floor track operate stably when the weight of the panel is taken by the top system, and the bottom only guides the door and prevents it from tilting.
If a sliding wardrobe is to comfortably store clothes on hangers, the safest choice is a 60 cm carcass depth; in practice aim for about 62–65 cm external depth.
A four-door hinged wardrobe works best when you divide its interior into three zones from the start: everyday clothes, household textiles and occasionally used items.