I don’t need a house that lasts 100 years. My estate will be selling it in 50 years, if I don’t sell it in the average ownership duration of 10 years.

Lasting a long time does not mean a structure is better in every way. Old housing can be a challenge in terms of safety, cohesive design, lifestyle fit, land use, environmental concerns, etc.

In Japan, for instance, it is popular to frequently tear down housing rebuild it, and it works well for them.

I have lived in and fixed up many old houses with strong bones. They might stand for hundreds of years but everything attached to those bones is a patchwork of afterthoughts.