And you're asking about NON production parts from a car that isn't on the market yet. As test drivers, they are looking for weaknesses to fix, and in all likeliness won't find the same problems that the mass market will find in the final car.
The car is not in production yet. The answer to your question can only be answered accurately after people are using the actual car and breaking parts.
If you are so worried about breaking parts on a car you don't have yet, order two of the "normal" consumables on every off road car—shock towers, front and rear arms, steering knuckles, shock rods, hinge pins, etc. Or, buy two kits and not worry about any of it.
Sorry, I don't mean to offend your sensibilities, but the whole R/C racing world of "the next best thing since sliced bread" always amuses me. The car isn't even out yet, but people are already worried about which parts they are going to break.