Couches are much better than beds
About 10 years ago I replaced my bed with a standard living room couch and I have never looked back.
Couches have a very important feature that beds don't, something to put my back against. Sleeping on a bed means you have to cover it with blankets and pillows, whereas a couch comes pre-made with a full pillow for your back. I feel significantly more supported and comfortable in a couch than a bed.
Couches also take up way less space in a room. I don't need a massive bed in the center of my bedroom taking up all the space when a couch is half the size. I've never worried about running out of space anywhere I've lived.