We've grown accustomed to it. What is 'it,' you ask? 'It' is space. Most of us have grown accustomed to having a lot of it. Quite possibly an excessive amount. It has been used as a status symbol. Which is why if a celebrity buys or builds a 'small' house it is considered newsworthy. At some point in the past 100 years we have gotten quantity confused with quality. Is there an alternative? Of course there is! Build smaller, higher quality homes.