"... even with all the diversity among these [launch] companies, one thing seems to be being overlooked. What about downmass?"
The cost of sending 1 kg to orbit (Up-mass) is going down. However, opportunities to recover mass from orbit haven't improved in the past decade.
A micro space station that lands.
And flies again.
Besides returning from space, Nazare reflies all of its systems, saving cost and increasing response speed.
The perfect dedicated platform for:
"... even with all the diversity among these [launch] companies, one thing seems to be being overlooked. What about downmass?"
"For ESA space systems, the re-entry casualty risk shall not exceed 1 to 10,000 (10-4) for each re-entry event (controlled or uncontrolled)."
Reusability brings logistic advantages to any limited usage space system. Mainly, by reducing recurrent development costs Hosted payloads become even more affordable.