This is a dying niche (source: have worked in Enterprise software for 20 years, used to live on a plane like your sister) that is largely moving to cloud deployments run by remote teams (those teams may themselves be co-located). The other prevalent model is opening a satellite office on the customer's continent, so that staff can be semi-local with shorter commutes.

And even if she was a good representative, look at the ratio: 10-20 engineers to 1 project manager flying supersonic. I'm not sure that's a great market niche.

> if there was supersonic flight they’d happily have found her a project in New York next and foot the bill, twice a week

I do have to laugh at this, because there are numerous consultants who do this now, using our current planes.

Edit: Amsterdam<->NYC 4x monthly for business/first class (equivalent to Boom pricing) looks like it will shake out in the range of $30k monthly in airline tickets. Very few employees in a company will justify that kind of travel spend. (And still not fly on a corporate jet.)