Great idea! But the problem, now, is on the client side. Readers need RSS. This lets authors publish at their own pace (which we can assume is relatively slowly) and doesn't burden the user with checking for new content manually. Of course, Twitter is a de facto RSS feed for some, and several other services (HN included) serve that role to some extent. But for the personal web, for those readers (and writers) of the…
Or you can use existing blogware and rss. Plenty of people do use rss still today. Plenty of small and major media websites still offer it. Every few years there's a hn thread something akin to "ask hn: does anyone use rss still" at which point its the most engaged thread on the front page, with nearly all replies either saying that "yes I use it every day," or even "I got to this very thread from an rss feed." Honestly, if you are a blogger and want to select a readership base that has certain characteristics you are interested in (maybe it overlaps with your stereotypical hn user: techie or in the technology industry with more money than the median worker), you should offer an rss feed to capture these readers who might not even bother with platforms like twitter at all.