You don't need to run and build the site every time. Jekyll crawls to a halt on my website if I build it locally when I write. So, I just write in Obsidian, iAWriter, or Sublime Text. The articles are sometimes un-finished, to-be-edited. I push them and Github does the magic.

Now, replace Jekyll with any SSG and let a tool handle the build (Netlify, Vercel, CloudFlare Pages).

For your specific tweet/comment like post, I remember deploying quite a few instances of something called "P2" from WordPress for internal department updates, team updates etc.

WordPress P2: https://wordpress.org/themes/p2/