"In aerospace if you launch a vehicle, you can’t go fix it,” James says. “It’s 10,000 miles in the air by the time you realize something’s wrong!" - And I think that I get nervous during deployments...
Most of aerospace lives in a 6mo-1year time between deployements/launches. And then Elon and SpaceX "deploy" every week or two it seems, absolutely blows the mind how they are going about it.