Apparently, I may have been optimistic when I estimated 25% cancellation rate, if the seats don't fold or stow in some way. It makes complete sense, of course. Being in the premium/luxury segment does not exempt the car company from meeting the basic needs of the customer.
(The sample size is of course not huge, and there is probably some selection bias involved, as well as various other factors that skew the poll.)
No other car will come close to matching MX cargo space used by real-world, average individuals (not talking about plywood haulers, or those who need two folded rows of seats for camping trips but only take one other passenger with them on the trip). No other car will have a cavernous frunk available.
Even if they don't fold flat in any configuration (highly doubtful standard seats won't, I can see why "rear executive" do not fold given how they differ in the Model S), there's just simply not enough people who haul plywood while also simultaneously not taking more than one passenger somewhere.
People are applying their own personal over-exaggerated needs of space, much like the countlessly empty pickup truck beds I see on a daily basis. Many people are thinking of the need to fold down seats on significantly smaller vehicles, or vehicles with only two seat rows and not three.
I simply see this as false outrage, and I don't think Tesla will be affected in the slightest. Even assuming there's no second row folding whatsoever, there are a ton of people who would love to have a performance car but right now are only limited to boring minivans and slow competitors. A big appeal of the Model S is that it is both a family sedan and a sports car on the weekends, and the same is now true of a Model X for bigger families. People will love it.
Not to echo earlier comments endlessly, but Tesla's specialty is incredible electric drivetrains and a car designed from the ground-up to be electric (enabling things like frunks). People buy Honda minivans for pure utility and folding seats. People buying a Tesla for any reason are going to have much different reasons for doing so, until we have an econo-model available.
And also to echo, any signature not certain about ordering sight unseen can defer, and then get a full and complete refund if not satisfied post-revealed. With a 27k and fast-growing waiting list, Tesla and TSLA will see zero realistic impact from "foldgate". Reviews aren't going to care about folding seats--when was the last time you even saw folding seats mentioned in any review, ever? They're going to care about the fact that it's a SUV that bests the McLaren on the drag strip to 60 mph.