" I love the car overall, so I'll keep it until such time as I get the first mailed speeding ticket based upon my car's GPS location and internal speed telemetry."
By which point you may no longer have a choice. This stuff tends to get rolled out slowly. First the water is tested by a new model, usually a special or exclusive one, then if there isn't a backlash, it trickles down the market, until all cars end up having it.
By the time it is decided by the powers at be to enable the "tickets via telemetry" or "Your 24/7 spy informer to the NSA/FBI/Whoever", probably the majority of cars will have the technology. They are not silly to enable these kinds of features while people still have alternatives. Not to mention self-driving cars, or cars which can override the occupants decisions on speed, direction and route. Sounds like a dystopian nightmare in a vehicular package to me.
And as the electronics get more integrated into cars, not only does it make it harder to rip it out and install your own, but it makes it harder to repair, potentially killing off the second hand market.
I've only ever dealt with and ran second hand cars, and one thing that you notice is that a cars electrics tend to go bad long before mechanical/engine wear becomes a problem. The more electrics a car has when new, the more there is to go wrong 10 years down the line (and the harder it is to debug). Cars that are all electric, or heavily computerised, will pretty much kill the second hand market IMO,
If the EFF wins, and people are allowed to hack/modify and replace the electronic systems within the cars, then things may turn out better than expected, but the automakers will lose lots of potential revenue. Not just from people buying second hand rather than new, but in certified garage/maintenance fees/licencing. I suspect they will fight the EFF tooth and nail over this.