If Roadster owners can always jump into the line later, ahead of the non-Roadster people who make a deposit on the Model S, what is the incentive to make a deposit now at all?
In fact, I would rather allow Tesla to produce a few hundred vehicles before they get to mine. Let them work out the kinks in the system.
From what I heard, the first couple of Roadsters had body panels that did not fit properly. This prompted Tesla Motors to switch suppliers for the carbon fiber body panels.
My thought is to wait and see how Tesla Motors grows. If everything matures and looks good from the standpoint of long term success, and if the Model S is really incredible, then I can always put down a deposit when they get close to producing a real car. If Roadster owners are really able to jump ahead of the 10,000 other deposits, then I am satisfied being in the first 1,000.
I will console myself during the wait by driving my Roadster.