I wonder if the developers will use coax or fiber? I assume coax is cheaper... ? Oh, or CAT-6? Question: for fiber, I assume it's easy to later upgrade from 1G

I wonder if the developers will use coax or fiber? I assume coax is cheaper... ? Oh, or CAT-6? Question: for fiber, I assume it's easy to later upgrade from 1Gbps to 10Gbps? Is the same true for coax?