Phil,
You are completely correct -take a hypothetical situation say - that London was the birthplace of the Industrial Revolution and became ''the Workshop of the World''.
There would now be a 100 acre custom built site showing every step and 'importing' Brunel etc, and the 'logical progression' through the textile & motor industry, starting say with RR, Messrs Austin & Morris, Midland Red's OWN buses etc, Swallow sidecars, BSA inc weaponry the West Brom Spitfires etc, the E-type Jag and so very very much more to today...
Amd the entrance prices???!!!!
....and just what has brum got - a warehouse stuffed, yes stuffed to the brim with treasures that are willfully being allowed to disintegrate.
trapio