Obsidian is great, and if you're looking for affordable, preferably self-hosted, highly customizable Markdown note-taking it is almost certainly the better option.

We're trying to be a slightly different kind of app though, where syncing isn't something our users ever have to think about and where collaborating and sharing is as accessible and seamless as possible (among many other goals!)

And yes, that means we're probably (on the whole) a worse match for the highly technical/conscientious HN crowd, where the aforementioned selling points of an app like Obsidian are in higher demand. Also a shoutout to Logseq (as mentioned by others in this thread) which is also a great option if you're looking for that kind of app.