Agreed on the doc-linking tech existing elsewhere. Obsidian just packages it in a really great format and UX. I really enjoy the local, note-writing experience here. Not sure if anyone uses Obsidian to publish a website, or if it’s even possible.
Of course it is :). It's a bunch of Markdown, something that dozens of static site generators happily ingest and turn into a website. I am using 11ty (https://mikka.is), a sprinkle of git to get things into production, Obsidian Git to simply push everything I write, as I write, and my website is done.
I’ve found that obsidian and Jekyll play pretty nice together. Not perfect but not bad