Where the name comes from.
The large AI companies coined it for engineers they send out to customers, to sit inside a business until the software does real work there. The point of the name is the direction of travel: the builder goes to the operation, instead of the operation writing a specification and waiting for software to come back.
For an owner-run business the idea matters even more. Nobody on your team has time to write a specification, and the parts of the day that cost the most are the ones nobody would think to put in one.
