Pretty sure this is because many people, with the economic instability of the last five years, are deciding not to by the big McMansions anymore and don't want

Pretty sure this is because many people, with the economic instability of the last five years, are deciding not to by the big McMansions anymore and don't want to take care of them... unfortunately, this means that those with more money that millennials also want the same "starter" houses. The real problem: too many builders built big-ass houses no one wants to pay for and take care of anymore.