I think Japan knocks down homes after 30 years because their building technology have evolved so rapidly that it would be irresponsible to keep people living in

I think Japan knocks down homes after 30 years because their building technology have evolved so rapidly that it would be irresponsible to keep people living in vulnerable homes (a bit like running similarly outdated nuclear power plants /s) when much better options have been developed. Plus, we all realized concrete does not last as long as wat thought to be in the '60s. What I mean is, Japan might be special and not necessarily generalizable.