Elon Musk's companies all share one common trait - they work as high tech companies and compete with low tech companies. Such companies can't fail as the methodology of high tech companies is superior to low tech companies- talent, automation, short release cycles etc. Uber immediately comes to mind, which other companies can you think about?
How did you validate your hypothesis? Why aren't all the famous dot-com failures (Pets.com, Webvan, etc.) which worked at "internet time" counter-examples? Or the continued non-success of Virgin Galactic, which proposed that private space tourism could be possible by 2013?<p>Without validation, I'll continue to believe your hypothesis is more wishful thinking than meaningful.
Elon musk's companies are doing well now, but and he and his companies were really on the edge failing not too long ago, so "can't fail" is not really a good way of putting it.<p><a href="http://uk.businessinsider.com/elon-musk-on-failure-tesla-bankruptcy-2014-11?r=US" rel="nofollow">http://uk.businessinsider.com/elon-musk-on-failure-tesla-ban...</a>