As a longtime Linux user I felt snubbed for when Dropbbox decided that ext4 was the only file system that they were going to support. God forbid that Red Hat decide that XFS was the default file system in RHEL7 and Dropbox couldn't make the effort to support the premier Linux distro?

I'm 100% on Syncthing these days. It's not perfect, but it gets the job done and I'm happy there's no big company involved. I set it up my way!