Re: Both my favourite authors gone now ...
... and Jack Williamson, he still wrote a few great stories at a very advanced age.
Death happens, part of the human condition.
More of a tragedy for Sir Terry was more that he had to put up with early senility from his early fifties or late forties.
Come to think of it, I am thoroughly sick of Internet obits in general, every comment piling on to be more piously regretful than the last. I am quite sure that Sir Terry Pratchett would agree.