I met John McAfee a couple times back around 1979-80ish and even then he didn't strike me as "stable".
As I said to someone else at the time, if I was carpooling and I found
out John was driving that is the day I'd say "go on without me I forgot
to feed my goldfish". I've never seen anyone get MORE stable
(short of Rigor mortis) as they got older.