Housing is partly a status symbol and those that can afford it often put measures in place to make sure that those they don't want to have living next to them c

Housing is partly a status symbol and those that can afford it often put measures in place to make sure that those they don't want to have living next to them can't afford to. Housing that is affordable for all, will by definition not be attractive for all. You imply the existence of a goal that doesn't actually exist and for which there is no consensus. Even if that were a goal, you couldn't reach it because there is only so much space. This would be a problem even, if we were to use what space is available, which is usually not the case for political reasons. Improved technology won't help you and even changing politics wouldn't get you to this.