I happily chime in.

An ode to Syncthing.

Because Synthing is free and doesn’t depend on server-side storage, they don’t need to put weird or unnatural restrictions on you. You can use as much space as you have on disk. You can sync as many folders as you want. You can sync any folder, no matter where it’s located. You can sync with anyone in the world. In fact, you can sync any folder with any number of people. At no point have you to wonder “but will it work with my plan”? If your hardware allows it, it will work. As simple as that.