CUT THROUGH DRAWBACKS:
https://blog.ipspace.net/2020/12/repost-cut-through-switching.html

LAYER 1 SWITCHES AND FPGA:

• L1 sw are the good old crosspoint bars. Application: Market Data broadcast
  • with FPGA some additional logic can be introduced directly on L1 (like trading algorithms)
  • Latency can be as low as 4ns (much lower is not possible as 4ns is 120cm at the speed of light)
  • Arista 7130
• white_papaer_2018