Never was a follower of ZZ Top, but they did have a couple a songs I liked.
Tom T Hall wrote a song years ago, with a line that said "the best that you can hope for, is to die in your sleep".
If ole Dusty wasn't sick, I guess it was just his time. No fear, no panic, no dread, and no pain.
We all have a time, and maybe Tom T. has a point.