... I actually use rclone mount _instead_ of sync for cloud storage. Tried syncthing a long while ago after finding nextcloud unreliable. Then stumbled acrosss a comment somewhere that talked about the mount feature in rclone (
https://rclone.org/commands/rclone_mount/). This is probably only practical for me now because we've got a 1G/1G pipe to the Internet. On the internal network I'm back to using nfs mounts (or samba for the Windows machines). Syncthing is good, but over time I've found all sync solutions to fall short. For backups I use a combination of rsync to the file server on both Linux and Windows, and then rclone out to the cloud.