Given that it's straightforward to upgrade an old home with energy efficient windows, insulation, and appliance, and that old homes last 3 to 5 times longer than new ones due to vastly superior materials (as any builder will tell you), I'd say that would not be a very good idea.
Then there's history, asthetics. destruction of topsoil, gardens, trees. Ah, the things that cannot be readily quantified, which is most things that really matter.