I've actually seen another developer that was probably in the same category write his own self-driving software. It kind of worked, but couldn't have ever been production ready, so it was just an exercise in flexing without any practical application.
So, what product that George built do you actually use?
Yes, because I've seen them build software that was actually used. And I've seen a few that did just like him, impressive sounding projects that had no usage.
I understand it's something subjective. I get the same feeling when looking at Damien Hirst's monstrouly expensive stuff that leaves me cold. Even after I get the concepts behind the works, my end feeling is of "so what?".
Why did you feel the need to say that?
Geohot live streamed himself broadcasting a transaction from scratch.
For that I respect his level of knowledge. Plus he built comma which is a product I use almost everyday.