That's a good point about survivorship bias but I do wonder about it. There are vast swaths of homes out East that are all pre-war. They're in places where peop

That's a good point about survivorship bias but I do wonder about it. There are vast swaths of homes out East that are all pre-war. They're in places where people took care of the homes though and have had them updated over the years. In essence, any home is slowly being rebuilt from the day it is finished. And if you don't take those steps then the home falls into disrepair and can't really be reasonably saved. We saw a lot of this when people wanted new homes in the new suburbs starting in the late 1940's. The pre-war homes were sold to poorer people who couldn't afford or didn't understand they had to repair the homes. They were quality homes but many of them have been knocked down due to that. And yes, there were also kit homes and other cheaper construction. Homes with dirt floors, no plumbing, etc. My grandmother grew up in a small 3 room home with outdoor plumbing and she had 7 siblings - no one can imagine living like that today. It would be considered inhumane. So yeah, that kind of stuff is gone too. But even the highest quality construction today pales in many ways. For instance, top of the line windows from Marvin aren't as good as the windows that exist today in many pre-war homes. So long as they have been restored, weather stripped, storm windows added, etc. That 100 year window will continue to outlive the highest end windows from today's top brands, if it's maintained.