[posnet]

"Jumbogram", an IPv6 packet with the Jumbo Payload option set, allowing for an frame size of up to 2³²-1 bytes.

At 10Gbps it would take 3.4 seconds just to serialize the frame.

[hugmynutus]

Luckily 400Gb/s nics are already on the market [1]

[1] https://docs.broadcom.com/doc/957608-PB1