[gruseom]

This is the sort of platitude that it's comfortable for everybody to agree on: it's just the quality of the material that matters, so just read better stuff. Well, no. That isn't the only thing that matters. The medium also has an effect. The internet is an excellent medium for random access to specific things and a poor medium for substantial thought and reflection. It's a mile wide and an inch deep.

Tao's blog is excellent, but how does one acquire the background necessary to understand his mathematical posts? By rolling up one's sleeves and doing hard work, most of which is likely done away from the internet. And this is the kind of thing that spending a lot of time on the internet makes it harder to do. That's my experience, anyway, as well as my observation of others'.