What are the "cheap floor treatments" and why would drywall or a house made of wood mean that a house won't last more than 30 years? There are plenty of houses

What are the "cheap floor treatments" and why would drywall or a house made of wood mean that a house won't last more than 30 years? There are plenty of houses built in the 90s with wood that are not just fine, but look practically new and modern.