Berlin researchers hacked Tesla autopilot to unlock "Elon mode"
cybernews.com
cybernews.com
If it upgrades features, there will be a market for "jailbreak my Tesla".
Obviously you’ll need more room for a car, but the market will form.
Many years ago, I used to have a custom chip to increase hp, turbo and other tuning. I had my car serviced under warranty by just swapping the chip out before dealer visits.
I don’t think this is a practical concern.
If the vehicles don't crash then impact resistance of the structure is not required, especially if "urban only" was a thing.
The absolute budget model of a plastic shell and bench seats.
To super luxury plush seating.
If the crash structures all remained what they are now...
Can you pay for "exciting mode" which maximizes braking and acceleration?
What about "preservation mode" which prioritizes the safety of the occupants over the safety of third parties in the event of an incident? You can bet certain people will have that made available.
"Defect mode" which cuts people up when merging.
"Overtaker" which attempts to overtake other vehicles rather thango at the average speed.
etc.
I think the likeliest case for full self driving is almost the opposite of what you're describing. Because it's all code and it's reproducible and testable the car company is liable if they put out something that speeds or drives dangerously. The result will be FSD cars all driving at the speed limit, leaving appropriate breaking distances etc. - driving much more conservatively than the equivalent human driver. It's also about incentives, you as the consumer might want a car that drives a hundred miles per hour and weaves in and out of traffic, but if the car company is the one facing the liability for it then it's not going to happen.
you can have your ECU replaced / reprogrammed now by certain garages so I bet back street hackers would start offering "upgrades"