I have used the lemon law in WI when I purchased a Lincoln MKX. The infotainment kept crashing and unfortunately it was the only process to control many of the features of the car. It was a systemic issues with all of them that year and model. If they had button to control thing when the infotainment went down it would have been different but they did not have that. In the end I only had to pay for mileage on the vehicle from the time I started to file which was something like 900 miles. It took a long time to go through the process and by the time it was done there were thousands of miles added that I did not have to pay for. I received a full buyback minus the fee for 900 or so miles.
If I stay the course and pick up a TRX I will be documenting everything through the service department just in case. No mercy for FCA. Point is make sure you get good documentation and get it early. If an issue starts right away but you wait for a couple thousand miles to have it documented it will cost you for every mile.