The linux implementation is quite poor. Among other issues, your answer is linux treats it as a TCP/IP link- so packets don't have any offloading for checksums, etc. it's also incomplete (ex- you have to physically unplug and replug the cord every time one side loses link- even a reboot).
This is my firsthand experence trying to get some tablet motherboards to link up and work as a proxmox cluster w/ TB3 as the link between nodes.
