Very much miss this. I love how they used this technique to build their email client. Emails were just files on the filesystem with a filesystem plugin that mad

Very much miss this. I love how they used this technique to build their email client. Emails were just files on the filesystem with a filesystem plugin that made their metadata queryable. So the email client was just a file browser window with some pre-saved queries that would let you find all emails by date, sender, etc.