Well, I agree that Forth is concatenative (like stack languages in general), and so are shell pipelines.

But you said, "Just because you don't specifically use forth does not mean forth is dead," and unless I misread your intent, you included your shell-scripting point on the theory that it was relevant to that question: whether or not Forth was dead. The implication seemed to be that, as long as people were using shell pipelines, Forth wouldn't be dead. But that's wrong; Forth could be totally dead while other forms of concatenative programming were alive and well.