I'd quibble with the Times' comparison to Mark Twain, though. Vonnegut was as keen a critic of the human race as Twain was. But Twain forced you to look at the ugliness, relentlessly. When Twain's characters tried escape, they usually landed back where they started. Like Jim in "Huck Finn," who's free and has $40 at the end of the book, but you know that's not going to going to change things much for him, people being what they are.
Vonnegut, by contrast, created science fiction escapes for his characters, like the planet Tralfamadore where Billy Pilgrim is transported at the end of "Slaughterhouse-Five." Billy Pilgrim is as much a prisoner on Tralfamadore as he was in Dresden. But the prison is nicer. He gets to keep his dog and has a nice roommate in Montana Wildhack.
Most of Vonnegut's sci-fi havens were thinly disguised metaphors for death. In "Slapstick," a character does die and ends up in a place the dead call The Turkey Farm, an endlessly boring waiting room, where people mill around a single telephone contraption hoping to connect with the people they left in life.
There is a wistfulness in Vonnegut's hopelessness, a wish that things might be better--a wistfulness Twain utterly lacks, and would probaby have ridiculed.
Although I hadn't read Vonnegut for decades, reading about his death made me recall the summer before college my friend Holly and I read "Breakfast of Champions" together, a book that got us through that last summer of adolescence.
Holly and I were angry about a lot of things--the complacency of our parents, the war, men, politics, organized religion--with that know-it-all superiority adolescents have. We were convinced that the Midland City of "B of C" was based on the actual town we were living in right then. There were too many similarities to be coincidences. And a famous writer knew all about it and agreed with us! The book provided a kind of Tralfamadorian escape valve that summer. We even discussed writing a letter to Vonnegut in hopes he would confirm our suspicions. But we never did.