Hope is not a plan. You may wanna fix this typo

;-)

Avoiding half the duration of a (boring, stressful) subsonic flight is a REAL, positive benefit in its own right — not a largely contrived one like “premium”-cabin classes. The latter derive much of their dubious value from denial of such a level of comfort & service to “ordinary” pax – not so much because the “premium”-cabin classes are inherently that much better than “cattle car” class.

Unfortunately, only that tiny percentage of the travelling public which managed to cross the Atlantic on Concorde while she was in service, has experienced – and KNOWS – the great benefit of that twice-as-fast crossing. And no one has yet experienced the much greater benefit of a similarly-shortened PACIFIC crossing.

The technical challenges of sonic boom reduction, better fuel efficiency, lower jet exhaust emissions, and lower noise in low-altitude flight are significant. But probably no greater, at least relatively, than those of originally creating Concorde nearly half a century ago!