An fpga that would be useful is a relatively expensive piece of hardware, even at scale. Additionally, finding skilled professionals that would be able to work

An fpga that would be useful is a relatively expensive piece of hardware, even at scale. Additionally, finding skilled professionals that would be able to work with them is much, much tougher than hiring a comparable graphics programmer. There's also the issue of developing for an fpga being more difficult, and thus time consuming, than writing tight c.