Not just hard things, but much harder than they've done before.
Note that Booster appears to be coming along pretty well. But Ship, which has a much, much more difficult mission profile than Falcon 9, is really struggling, because going to orbit and back is far more difficult than going most of the way to orbit and back. (Please forgive the abstraction - I don't have the relative numbers at hand.)
Note that Booster appears to be coming along pretty well. But Ship, which has a much, much more difficult mission profile than Falcon 9, is really struggling, because going to orbit and back is far more difficult than going most of the way to orbit and back. (Please forgive the abstraction - I don't have the relative numbers at hand.)