Of course, his knowledge is outstanding and when he detected Bitcoin very early, it showed already, how educated he is to see Bitcoin and anticipate how successful it will become.
His knowledge as a Computer Scientists helps him to understand Bitcoin and Blockchain Technology even better and what I like most from Andreas Antonopoulos to explain Blockchain knowledge easy to normal people, who are not coders.

I don’t know why he’s less active right now but after following Bitcoin for 10 years, he might need a bit vacation because it might be stressful and after his achievements from Andreas Antonopoulos about Blockchain education, his vacation is well deserved.