I'd guess that's because of another phenomenon: A "good" house is one ready to sell to the next guy. Youre never living in your own house, always the next buyer

I'd guess that's because of another phenomenon: A "good" house is one ready to sell to the next guy. Youre never living in your own house, always the next buyer's house. Hence the need to keep up with the latest fads, desired by the next guy who is buying from you for the sake of the next guy.