I have one suggestion for the authors. Make it clear on the front page exactly what Syncthing does. There's lots of information about Syncthing's qualities but if you don't already know what the software does, it's not obvious.
But the same suggestion could be made about almost any product with a web-site these days. Indeed Syncthing is doing much better than most; they have a box at the top of the page with a one-sentence explanation/plug.
similar to dropbox
many separate sync folders
many computers to many computers syncing.
Personal storage, no data in the cloud