Re: CPUs? Apple stopped making servers even though there was a demand
FPGAs don’t scale up. A data centre stuffed with FPGAs is a very expensive thing to run. They’re only good for small scale deployments, and even then they’re good for only certain applications. Plus the bigger FPGAs are eye wateringly expensive. And they’re a bastard to develop for; I’ve seen FPGA based developments take so long that they’ve failed to keep up with the software guys who’d simply been waiting for Moore’s law to solve their problems.
If large scale up is required it’s far better to get an ASIC built with the same vhdl (or whatever) and save a ton of energy.