It takes 2 things for a car to become collectible and garner "investment" level increases in value:
* exclusivity
* devoted following among extremely wealthy people
It CAN happen that certain cars are not very exclusive when new, but become exclusive due to attrition as they become older and become collectible. 60s muscle cars are an example. But that took many decades. I cannot see that happening with the Plaid.
I think the iphone comparison is valid with Tesla vehicles.
How much are people paying for the old iphone 4, 5, 6?
The original iphone would be the roadster.
It's older tech, slower, less battery life, doesn't run the new apps and games. Less features, lower res display.
Not a lot going for it.