As someone with an interest in the technology involved in this stuff: it’s a LOT more viable today than it was 60 years ago. Today, you have:
extremely advanced composites, ceramics, and metallurgy
extremely advanced construction techniques, including bespoke additive, subtractive, and planar deformation
incredibly detailed computer simulation in various domains to enable rapid iteration and perfection of components
60 years of research into jet engine energy and noise efficiency
60 years of research into supercruise
recent advances in combined cycle, geared turbines, and rotational detonation engines - not to mention, theoretical advances in the future around electric, hydrogen, and fusion-powered concepts
recent flight research around suppressing noise during supersonic flight (QSST)
There is a TON of technology and innovation that’s coming together recently to make supersonic transport an actual viable thing. For the record, it wasn’t a viable thing when the Concorde was doing it. That was basically a national pride project between the UK and France.
As someone with an interest in the technology involved in this stuff: it’s a LOT more viable today than it was 60 years ago. Today, you have:
There is a TON of technology and innovation that’s coming together recently to make supersonic transport an actual viable thing. For the record, it wasn’t a viable thing when the Concorde was doing it. That was basically a national pride project between the UK and France.