[deadgrey19]

This company http://exablaze.com/ (which I do some work for) builds FPGA based NICs and switches nearly exclusively for the HFT industry.

Arista discontinued the 7125FX switch (with an FPGA in it) because of limited uptake. In the end, I think this was for 2 reasons, 1) by the time the switch got to market, the FGPA was slow and out of date 2) only 8 ports of the switch were FPGA enabled and because of 1) were slower than regular ports. The switches made by Exablaze use very modern FPGA's (Xilinx Ultrascale) and the entire switch is implemented in the FPGA, yet is one of the fastest (if not the fastest) switch you can get.