There is one point in your post I wish to clarify:
Davis ponders on whether we should [still] be promoting blogging as a way to connect with an engaged community of thoughtful contributors.
I am not questioning the act of blogging or microblogging. My work associated with the #IndieWeb surely demonstrates that. Rather, I am concerned about the idea of modelling such an intense pattern of writing as means of introduction for those who maybe uninitiated. Just my opinion I guess.
The irony of it all is that I love your writing and always get so much out of it, so I guess I should be grateful for #28daysofwriting as well as your newsletter.
I am left with a thought, maybe the newsletter not micro engagement that has been the ‘death of blogging’? Anyway, enough for now.