Mushrooms' habit of appearing overnight made them a common metaphor for anything unpleasant that appeared suddenly, from arriviste courtiers to religious heresies.
These are all indicators of an arriviste city whose new population mix struggles to find an image that represents a city still in the search for a new identity.
It is not a peerage and, among real aristocrats, such titles are the objects of derision, obtained as they so often are by arrivistes of the worst possible kind.
Good luck to them with their good fortune yet how pathetic would it be if they now wanted to cut themselves adrift of the hoi polloi like some arriviste aristocrat?
Most buildings' basements were flooded, and the arriviste businesses and longtime residents found one another at a kind of block-party-meets-wake cleanup.