SpaceX's launch cost is already about $60 million in expendable mode, so your comment about bringing it "down to $60 with their reusable technology" makes no sense to me. If they pull it off, the cost might drop to more like $10-30 million.

A rocket that costs like an expendable launcher but can be reused will be a massive game changer, not "just another incremental improvement." Maybe all the changes needed to get to that point are incremental, but that doesn't mean the result won't be huge.