A question to those who think the second row isn't a big deal - What do you think will happen when Consumer Reports, Edmunds, Car and Driver, etc., do a detailed review of the vehicle and compare it to luxury SUVs from other manufacturers? They will say: Model X is superior in acceleration and handling, efficient, great for hauling 7 people. However, doors prevent use of a roof rack, lack of storage and inability to haul large objects because the second row doesn't fold flat like it does in all other vehicles in its class, etc. The negatives will definitely affect sales among people who have not yet drunk the Tesla kool-aid, and are already worried about "long charging times, limited range," etc....
Regarding the poll - This is a poll on a Tesla forum taken by the most loyal Tesla followers. If a significant percentage of these people will not buy the vehicle because the second row doesn't fold, what do you think will happen when an EV skeptic is cross shopping with ICE vehicles. If anything, I think the poll here paints a more positive picture than what you will get among real world buyers, and that is bad news for Tesla, because many of us will accept almost anything now in order to not drive another ICE vehicle.