I have a question about first stage reusability.
How many missions would SpaceX expect from a reusable first stage rocket?
Are we talking the same sort of reusability as a commercial jet?
What are the limiting factors?
The aim is to maximize re-use to lower costs. So the limit is repair costs and repair quality v risk of failure and cost of failure on the next mission, with the long term goal of airplane-like reusability.
Whether to re-use would depend on the cost of the satellite being launched.
E.g.
Say a new rocket is $100M to launch and has a 1% kaboom rate.
Say cost to relaunch with an re-used first stage is $50M. (Target is exponentially lower than that, of course, but it's early days).
Say the kaboom rate increases 5% with each mission.
A company wants to launch a small $100M satellite. Each 1% chance of failure costs $1M.
Given that they'd save $50M on the launch, they'll readily opt for reusability, maybe into the 9th or 10th mission.
A company wants to launch a $1B satellite. Each 1% chance of failure costs $10M.
A re-used first stage would have a 6% failure rate, costing them at least $50M in extra risk, rendering re-use pointless.
Corollary: successful re-use will lead to the construction of cheaper, less-reliable satellites.