SpaceX uses a different philosophy. To accelerate the process, they are willing to absorb failures. So far it has worked. And there have been some spectacular failures. For this launch, it seemed like all was well until the first stage failed to separate from the second stage. When the first stage went into its return mode, all went wild. Should have had a manual override for first stage separation. I don't think the fix will be that difficult. The first stage was generating twice the thrust of the Saturn V. That alone was pretty cool.