Thought I'd chime in with a comment on one big advantage of paper over online jounrals. That is that the paper journals have often been annonted by the readers as kind of the low tech version of a wiki. At least that's the way it worked until about 5-10 years ago in department astronomy libraries... if you had something to contribute to an article, you jotted in pencil in the margin. This is why I really like academic libraries... there almost always ends up being good stuff jotted in the margin.