Actually, 13 Features is a feature on Jason Snell’s Six Colors. This time 13 features on Files:
Perhaps most important is the simple fact that Files can now see destinations that aren’t cloud services or other apps. You can add local SMB file servers to Files by tapping the ellipsis icon in the Browse pane and choosing Connect to Server, then entering the address of your SMB server. While you’re connected, that server will appear in the Shared segment of the Browse pane. (Strangely, Files doesn’t use Bonjour to detect nearby servers and display them, as Finder does.) I have a Mac mini on my home network that I use as a file server, and it’s been a delight to access files on it, directly, from within Files and apps that use Apple’s file interface.