HN threads is probably not the best example because the site is pretty readable already. But it's not that difficult to fetch a thread and render it in the Org-mode outline format. nhreader.el¹ does that. For reading articles I just use eww. it has (eww-readable) that removes all the fluff like banners. The trade-off that eww (by design) doesn't do any javascript. That makes it difficult to use with websites with client-site rendering (React, et al.). For that, I have a little automation elisp² that uses OSA (JXA) and extracts the rendered content off the page. I need to figure something similar for Linux, but it's not so straightforward, the only way I know is to run the browser with the debugger port.
¹ https://github.com/thanhvg/emacs-hnreader
² https://github.com/agzam/.doom.d/blob/main/modules/custom/we...