“Fully reusable” is still a little wiggly. Cars are fully reusable and they still get replaced after 150k miles. Are we going to begrudge someone calling it reusable if they have a MTBF of 10 flights? Or at least, as long as partial failure results in a successful mission but a decommissioned engine or unibody?

You’d use your whole manufacturing capacity then to do 90 missions a year.