Its funny, going from a life where nothing is going on and you could play Outpost for hours on end to a life when things are so busy, you can forget how to sit down. For me personally, There are many factors that consume my time, but I do my very best to play a single player game once a month if not once a week. I think the assessment above is fairly accurate. The figurative children of New Terra are growing up. In a world where the draw to games is better graphics and online reputation, its difficult to find people and keep people who can appreciate the truly awesome thing that the OPU is; and I'm not just referring to the games themselves, but the fact that they have somehow motivated as many people as they have to cling together with the common dream that it just will not die. There are plenty of games that once had a much greater following which have now simply ceased to exist, with no following, no community, and no trace of ever returning.
I'd be the last person here who would want to hint that the community is on a decline, but I find myself hard-pressed to come up with another conclusion based on the data presented. As time goes on, we grow different in life and situation, and those differences change our views and priorities in existence. An analogy might be that the children of New Terra are running out of resources (be it time, priority, funds, etc) to build a starship needed to keep the dream alive and continue to a bold new world. It remains to the time and effort of those that remain to make the best use of that which we have left and press onward remembering each in our own minds why we are here, and that to truly believe in this means that extinction is not an option.