[laffOr]

Not German so I can only talk about how it is going in another country:

- Massive change in the average household size: way fewer people live together now (delayed couple & family formation, divorce, etc.). If you go from 4 people per household to 2 people per household, now you need twice as many homes.

- Massive internal migration: declining population in a lot of rural areas and increasing in cities & their suburbs. So lot of empty houses and super cheap houses in Dumbfuck, Nowhere but scarce & expensive homes where people want to live.

[bell-cot]

Yes.

There is also the problem of housing "lost" to the lifestyles of the well-to-do - whether that's 1%'ers who own multiple houses, or regular housing which becomes short-term rentals (Airbnb or whatever). In places, those are major problems. Overall - the biggest problem those cause might be that they're socially divisive distractions from bigger issues.

[anal_reactor]

Makes me think of the typical example where building more wider highways increases congestion because more people travel by car.