It probably has to do with the era. With the obvious exception of The Simpsons, this kind of humour was quite rare for its time. With the explosion of the inte

It probably has to do with the era. With the obvious exception of The Simpsons, this kind of humour was quite rare for its time. With the explosion of the internet (especially memes) and various animated shows it's now pretty ordinary. I'd be surprised if most of the modern famous animators (Trey and Matt, Seth MacFarlane, etc) weren't fans of The Far Side.