The prospect of yet another domestic supersonic aircraft brings back memories of my youth as an air traffic controller (Bos ARTCC), controlling aircraft (nonradar) over Nantucket, and with a mix of climbing/ descending TransAtlantic east/west traffic crossing with Bermuda/Miami north/southbound traffic;
HORRORS!
here comes Concord out of JFK, climbing to 22,000, practically demanding an immediate climb to 43,000 or it would burn so much fuel that it would have to return to JFK!