Thanks for the link. I'm glad that the article didn't take the stupid "English is going to pot" angle that some others have taken. I'm not sure I agree with all the reasons why the hyphen is disappearing from some words.
From what I've seen, I totally agree that many people are just not sure when to use hyphens, but I think this usually results in overcorrection, not underuse. I've never encountered any "distaste for its ungainly horizontal bulk," either. And I don't think it really has much to do with "informal ways of communicating." There's been a tendency to streamline and simplify the use of punctuation ever since it was first introduced in writing.