You should read one of Jerry Pournelle&#x27;s rants on the subject.  There was a lot of bitterness from people who supported the program.<p>The problem with SSTOs, in general is that while getting them to take off and land isn&#x27;t a big hurdle, getting them into orbit with more than a nontrivial payload is pretty difficult.<p><a href="http:&#x2F;&#x2F;www.jerrypournelle.com&#x2F;slowchange&#x2F;SSX.html" rel="nofollow">http:&#x2F;&#x2F;www.jerrypournelle.com&#x2F;slowchange&#x2F;SSX.html</a><p>It&#x27;s a concept with its supporters, but there&#x27;s a pretty large program risk - the numbers are so tight you may get to the end of your development and realize your rocket works but can take only, you know, 25 pounds of payload to LEO.  Or maybe a few tons.  Or maybe you can&#x27;t get to orbit at all.<p>SpaceX&#x27;s plan to land each stage individually probably makes a lot more sense from the risk perspective.