They just skipped the special metadata device. It’s been a lifesaver on my proxmox backup server. It went from barely usable to pretty good. And that’s on first generation of HP microserver.
https://forum.level1techs.com/t/zfs-metadata-special-device-z/159954
As far as I remember, RDP server in gnome (or any other exisitng DE) can’t do multiple sessions yet. You have to be logged in via display manager to remote access the existing session via RDP.