The cynic in me wonders if they have any incentive whatsoever to produce an actual game at this point. Before the thing has even released they're bringing in something like $2m per month, or the equivalent of something like 30k $60 unit sales per month.
When they release the game, that income stream changes dramatically. Their existing customer base, those who are happy to throw money at concept sales, stop being the cash cow. Instead they have to rely on *new* sales and that's a scary place to be. Your future is then make or break on how good the product you delivered is. So yeah, why not keep developing until you've milked that cash cow dry?
FWIW, I'm not implying that this is what's going on. But the longer development continues for and the more the scope of the project keeps increasing and churning, the more it looks like that from the outside. I hope I'm wrong. I hope that for the £30 I paid I get a AAA game that I can play for years to come. Hope is pretty much all I have at this point. ;-)
Sadly, I think that's precisely what's going on. When Chris states that the scale of the game and its development is based on funding income - he just means that the more people give him , the longer it will take (because it's going to be even bigger and better, of course).
Every new concept ship means yet another sale and a lot more money, but it also adds even more work to the already excessive backlog, designing and modelling the ships. People are still waiting to see ships they bought years ago, without adding more and more. And with ships like the Endeavor, completely new game mechanics which will have to be designed and implemented. Science Labs? Space Farming? Spacial Telescopy ? Using the Supercollider ? Engineering debt is an apt term.
Perhaps they realise just what an enormous task they have set themselves, one that grows with every new ship. Perhaps they realise they can never catch up and will never get the game to a completed and finished state. But they have no incentive to ever finish it. Because that would mean turning off the money tap, and I think CIG are now addicted to the $$$ stream.