He's like most inventors, on to the next thing and leave the past ones for others to work on. He's more interested in the ideas.
It looks as if he's having more problems with Proxi, as he was hinting at it coming out in the Fall of 2019 in that interview. He's so far ahead of his time in thinking of new things it might be impossible to go through with it at the moment without huge backing.
I hope the US government doesn't find it as he was talking about that episode (film)? of Star Trek with people living complete lives, then coming back to their present one to find it was all false. Was that the Ribbon and Bridge one? Implanting false memories? That's what the Lensmen in the E E Smith "Lensman" series did with some of their baddies.
