Look, HST was a funny, articulate guy who made a lot of us laugh in college in the 70s and 80s. I remember reading Fear and Loathing in Las Vegas in the backyard of a rented apartment in Austin, TX in 1983. I starting laughing so damn hard that the girl next door came around to make sure I was okay. Not many books are so entertaining that you can so clearly recollect reading them.
Everybody probably should have seen this coming eventually. In a preface to one of his books ( The Great Shark Hunt, I think), he wrote that he wanted to commit suicide right at that moment, but 'didn't have the guts.'
Unfortunately, suicide is a gift that keeps on giving. I feel sorry for family and for his closest friends. It appears he's been a difficult person for those closest to him, and this puts a sad close on the story of his life.