The stupidity of the ‘spare bedroom’

A nice short piece in The Spectator, of all places, about the appeal of tiny homes. Here's a snippet:
Given how expensive domestic property is, it is bizarre how much space we waste. One of the dumbest things is the ‘spare bedroom’; in London, even a crappy spare bedroom might cost you as much as a new Bentley, and yet spare rooms spend 95 per cent of the year housing a stupid empty bed. In the tiny house movement, almost every square foot performs double duty. There are beds that fold into the wall, and storage drawers built into the risers on stairways.
Image courtesy Tiny Eco Homes UK