[zamadatix]

Realistically I think we would be fine to make packet size significantly larger than Ethernet would currently allow if we really wanted. E.g. Infiniband already has 1x lane speeds of 200 Gbps without relying on any interpacket gap for clock sync at all. Ethernet, on the other hand, has been consistently increasing speed while decreasing the number of bits used for the interpacket gap since it's less and less relevant for clocking. Put a few bytes back and you could probably do enormous sizes.