No engine product ready for purchase or no engine that could ever be built? If the former, whatever tell R&D to go do their job. If the latter, maybe it was a scam.

Which is it?

Wishful thinking, delusion or scam.

There are so many foundational issues with low supersonic flight from a usability perspective as well (time zones are not your friend for some of it), that lots of routes can only command a premium in one direction.

You have to make so many rosy assumptions to even believe this makes sense if someone was willing to pour billions into engine tech - and still maybe have no options that are commercially viable. It’s also a nightmare from an environmental perspective.

Unless Boom can get some government to write off the billions needed to develop engines then it's all fiction.

I know. No one that understands turbofans would imagine otherwise. This sort of thing need sovereign government budgets.