If you want to be pragmatic there are FPGA boards and the SiFive Unmatched. Both are slow and require a degree of trust. But they might make a small home server

If you want to be pragmatic there are FPGA boards and the SiFive Unmatched. Both are slow and require a degree of trust. But they might make a small home server. Of course just because it’s open/free doesn’t mean it’s more secure.