Infinity has been in the works for a long time, but a lot of that work is not only done by one man. Members of the early community helped build most of that demo, and if you have noticed not much has changed since 2010 due to the fact that the community team disbanded. While yes its an amazing proof of concept among her flaws is that the network code is very shoddy. The Game that the creator is offering now is literally just the alpha test demo that has been available since 2011. While I would love for this to be how SC or ED works, the networking behind it for even 20 players is extremely difficult, much less 100-1000+.