Wow! That is probably the most enlightening explanation I read on the issue. Thank you very much for such an interesting read!
I have a couple of follow-up questions if you don't mind
1. Considering that in Japan, most customers are connected to the internet through very good connections (100Mbps symmetrical with quite low latency), do you think it could explain why SE chose a server live-state architecture? And do you think it's a wise choice considering the quality of worldwide connections as of 2013 (NA, SA, EU, Asia…), bearing in mind that's there's only 1 datacenter for each half of the world?
2. Do you know of any other games that are also based on such a server live-state architecture?