because green was the first server to execute the timeline roughly "on schedule" (the content was in development during blue's timeline, and released as-available, instead of accurately reproducing the correct era-to-era timeline durations)
blue is like the "alpha server", green is the "beta server" (or "release candidate"), and green 2.0 will be in theory the first "official release" where the entire timeline has already been played out and tested in order, and it's just a matter of it being released again
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