Coupled with a long-established Luxury Industry catering to our Aristocrat Rulers, it also has rich weather. Rocky beaches prevent amphibious assaults whether from Isissisisis or disgruntled revolutionaries – enemies both foreign and domestic. Such enemies can never reach the platinum shores.
When our rulers tire of $163 Kobe beef hamburgers in wintry Manhattan, it’s off to their feudal tropical paradise. Such long cross-continental flights are no longer a bother but a delight in themselves in private jets fitted with luxury appointments for the discriminating Murkan Oligarch.
As dark, dank climes return to Medieval Times ala Game of Thrones, so shall tropics return to a Colonial Plantation Lifestyle. Pleasure centers of Manhattan and Honolulu will hold ultimate power like Rome or London with feudal castle outposts spread throughout the Empire like Medieval England and France. Castles weren’t just for Dukes and Knights to feast & wench, but IRL were guardians of trade routes and agriculture and oppressors of local peasantry.
Murkan Aristocracy can even dodge the r-r-racist bugaboo and avoid coloreds completely by saying “I’m not a racist, I just live in a Penthouse in Honolulu!”
Not only shall cities be gentrified, but all of Murka will be gentrified.