Yeah, none of it was really about file systems. There was a brief mention that file systems look like a graph, and that you build roughly an index so it looks graph and thus database-y, but you could store it all in a sqlite database with a column, called filename and a column called content for all the details about file systems this post went into. I too was expecting something more in depth about file systems like for instance, cluster file systems have made a little to no advancement. ZFS is not a cluster file system and we've been needing a good one of those for decades, ever since VM's became feasible on consumer grade hardware. Still, files on desk is better than having to pay Oracle a fee per-skill on today's modern, open Internet. That was never going to happen.