No actual data other than "What exactly those breakthroughs could be is entirely unclear."
Say it aint so!
I liked Elon about 3 years ago before we found out he was a master Marketer. I feel played.
/s
What’s wrong with him being a master marketer?
The most relevant example is actually his recent public statements about a Mars base. He actually stated in 2016 that he would be sending an unmanned rocket to Mars in 2018. 2018 is almost over, so he quietly pushed plans back until about 2023, and started hyping up his Mars base stuff for the far-future.