Sarnie, there are some good points there, but.....
I think you are looking at this site as a business opportunity, which it could be if that was our intention..... but its simply not, its meant to be about having fun with OUR cars and the love that we share for them......
Sure you may see this as a lost opportunity but as Chris says, its hard enough running this place as a 350z site, without diversifying into other marques.
I don't think we are trying to be another Pistonheads or anything. You'd need to do it as a full time occupation if that was the case, and lets face we all have lives outside of here.
I think we have to stick to what's made us successful so far. As for ex owners sticking around. There has never been a problem with that as long as those people respect what the site IS about, remembering why they joined in the first place and that other people will now be doing the same. Just because they have moved onto other cars, doesn't mean that they have to forget all the knowledge that they have acquired etc!
As for ex owners, I can still think of a good few of the original people that we here when I joined that still post regularly. You are never got to get all of them to stay around and post as they did because the primary reason (the car) has since "left the building".....