The internet, though, is kind of a different beast than radio or TV because it is so interactive. It's not just 1-way, 2-way, or many-to-many; it's all those things simultaneously. I'd love any recommendations on books/authors that pick up the torch from McLuhan and Postman, and try to cast some light on what "the medium is the message(/metaphor)" means in the hyper-connected age.
[1] https://en.m.wikipedia.org/wiki/Amusing_Ourselves_to_Death
edit: Just a thought, it's not only the interactivity that makes the internet unique, it's also its infinite flexibility: it can emulate print, radio, TV; but it can also invent its own versions of those media (podcasts, youtube, twitch, etc). It can invent entirely new kinds of media too: VR, AR, etc. So maybe the internet is a kind of "meta-media", which makes the analysis much more difficult; but promises some real gems of insight - if any can be found.