I don't know about thinking. A lot of people thought about landing orbital rocket stages, during the last 70 years of rocket technology. Yet it's only been done

I don't know about thinking. A lot of people thought about landing orbital rocket stages, during the last 70 years of rocket technology. Yet it's only been done by SpaceX a startup everyone laughed at with the argument that obviously the existing players would have done it if it were feasible.