I loved the idea of the slides interspersed with text. Just posting slides is usually lame, because you lose out on the actual talk, which contains most/much of the actual information.
The slide interspersed with text format could be seen as a more heavily illustrated, easy-reading sort of paper. More similar to the talk than a traditional accompanying paper would be, but not just the slides. But I think it's still non-trivial work to make a good version, which is why people often just throw up the slides, because that's almost literally no additional work.
You basically have to take the same source material and think how you would write it up into a blog post, which is not 100% the same as thinking of how to give it as a talk. Though I guess a first-cut solution could be to just record the talk and type up a transcript in between the slides.