I’ve had a fair amount of experience in the bizjet field and doubt a SST bizjet will be built. The latest Donnybrook is the super long range bizjet—I doubt there’s room for three of them at $70+ million a piece but Dassault just entered the field.
OTOH, when Grumman designed the G II, they estimated if they sold all they could, it would be 90; went on to sell 254; then about 1500 of the follow-on versions. The Global was planned for 250 frames, now stands at a 1,000 planes delivered. So, who knows.