Green is the culmination of the project that project 1999 refers to

[Gustoo]

Yep. No reason for a blue guy to go green when he is already at GREEN's endgame.

Its just for that vanila to velious progression experience, which has an end. If you're in it for the end game then blue is your destination.

I wonder what it would be like to have 3 total servers. 1 vanilla locked, 1 kunark locked, and 1 velious locked. You can take a 1 way trip to the forward expansions but you can't go back.