I don&#x27;t think NASA has the budget to launch 23+ orbiter missions, regardless of how cheap and generic the orbiters are. Anyway, I think if you&#x27;re going to spend a large fraction of a  Billion dollars just getting there, it makes sense to spend a bit more to make sure the payload is optimised for the job. Each one of these missions has a good chance of being the only one of it&#x27;s kind for one or more generations. Better to do it right the first time.