I’m not sure that it would even be larger now than before.
Subsonic flight has become much more efficient, cheaper and when paying for higher class, more comfortable. This is one of the reasons often mentioned for the economic demise of the concorde. The audience willing to pay $6000 on a concorde ticket, could now spend $4000 on first class subsonic with a seat that fully reclines into a bed. They can fly a little longer at night but sleep the whole journey.
The number of people who will pay--or can make their companies pay--$500+/hour for a handful of saved hours on a flight which mostly won't go into incremental productive work is miniscule. Most business travelers aren't international lawyers or consultants flying across the Atlantic for a quick get together. But pay a bit more to fly a bit more comfortably to be more rested/as a perk and maybe even save on a hotel room night? Quite a few people, even if not the typical traveler.
Subsonic flight has become much more efficient, cheaper and when paying for higher class, more comfortable. This is one of the reasons often mentioned for the economic demise of the concorde. The audience willing to pay $6000 on a concorde ticket, could now spend $4000 on first class subsonic with a seat that fully reclines into a bed. They can fly a little longer at night but sleep the whole journey.
Wendover did a good economic analysis of the concorde: https://youtu.be/n1QEj09Pe6k