Matt Fitzgibbons says it’s like the ancient Roman roads. I’m not sure the analogy works very well, but I do think that it would be wasteful to deorbit it. When he says it’s “only” three or four billion a year, I don’t think he appreciates how much more we’ll be able to do for much less in the near future, But I also think in the next decade we’ll have the ability to move it higher, and preserve it as a museum.