[jandrese]

Multicast doesn't work on the big-I Internet.

A battery system is almost certainly easier than physical servers spread across the globe, even when you account for the cost of the battery.

[jedberg]

I meant anycast (fixed now). But based on this writeup, they don't seem to care about how much of their own time it takes, only to prove it is possible. It was in that vain that I suggest two servers would be better.

[labawi]

I have feeling that internet infrastructure material and energy costs for a anycast IP/site would dwarf the energy/material costs of hosting the site in a datacentre.