Each Castle was the economic centre of it's town and region, constantly upgraded over centuries to keep them on a state of the art level.
Since 1900 technology progressed revolutionary way faster than in about 800 years or more before.
Without Nazis and Stalinists our Castles would be today modern versions of Paris La Defance, London's The City or Warsawaz Business Quarter, just with some more art, I assume. Castles were turned by Holocaust profiteurs into Museums to tell their version of history about us, usually after burning the library as in Wartburg.
The rooms, workshops and storages can be transfered having solid build walls designed and build to last for generations against all odds, depending on need as a base for prosperity of still town and region.
#noblessoblige