Generalist audience maybe is vanishing but I can see more and more domain niches attracting interest for relevant content like a widespread academia, this being

Generalist audience maybe is vanishing but I can see more and more domain niches attracting interest for relevant content like a widespread academia, this being open courses legacy imho. Sure, many blogs would not survive a peer review, but there are more manners to publishing than academic papers only: industrial papers, letters to the community, tutorials, reviews of literature, industry news and conferences, etc. So the point is: find your industry for applications, grow a reputation and you will attract a like-minded audience.