The statistics here are inverted. The main marginal cost of a launch is the risk of loss of payload which the customer must insure against. The risk of loss of payload actually goes DOWN with more launches, making costs cheaper the more a booster is reused.
It’s as if your car gained value with every mile driven.
The fact that customers launching exceptionally expensive payloads (the US space force, for one) tend to demand new boosters is not consistent with this.
But even then, it doesn't change that the booster has a maximum lifespan and/or eventually increasing repair and therefore depreciation - we are working on an amortized basis.
They don't anymore. They actually require the use of flight proven boosters for important payloads now. Astronauts too are usually sent up with reused boosters, for safety.
We don't know what the maximum lifespan of these boosters are. There are workhorses that have over 20 launches under their belt, and no sign of deterioration. Obviously at some point something will give, but we're not there yet.
> The fact that customers launching exceptionally expensive payloads (the US space force, for one) tend to demand new boosters is not consistent with this.
It’s as if your car gained value with every mile driven.