You could add:
- Concorde didn't work flying east because with the time zone thing, you might be flying real fast, you still arrive super late. Meaning you could as well pay less and fly the red eye...
And the other issue in your case is flying supersonic over land but I hear you.
Of course, some people are less sensitive to these things than others - and jobs with a lot of travel probably select for people who find the experience of flying tolerable.
So while "just" flying East might be less attractive, very brief return flights will be attractive even if one of the legs doesn't seem very beneficial.
There are plenty of scenarios cutting hours off will improve. Whether there are enough of them to make Boom profitable is another matter.