Though none of the parts I've had to replace are computer related. Mechanical parts are much more likely to wear out or rust.
I admit I steal their vehicles sometimes in the dead of winter. Mine has no working heater. Unless it's under 20ºF or so, I don't even bother to put the hard top on it.
I've had my Jeep for 15 years now, and am starting to feel the itch for a new vehicle. I have my eye on a 1992 GMC pickup. It belonged to my grandfather who passed away in ~2005 and has been stored in a garage since then. I've put about $4k into it getting it roadworthy again after sitting for that long, but it's only got 15k miles on it and the interior is mint. If I bother with it, it needs the paint buffed a re-coated on one side that was partially in the sun where it was stored - at which point it will effectively be a brand new vehicle.
I'm looking forward to that big carburated V8 after a decade and a half driving a 2.5L i4 :)
The obvious boycott would be to sell the car and never buy a Jeep again. Until the next car you buy is also updated to include ads and quietly sell tracking data they've collected about your family, so then you sell that car and never buy from that manufacturer again either.
Then before you know it, you end up buying an American-made luxury sedan to take the kids to soccer because you've convinced yourself that buying a premium ad-free car with the optional monthly subscription for the seat warmers is worth the investment and all the "affordable" options are either ad-supported American-built cars or artificially overpriced due to trade wars.
They'll backtrack if they lose enough money.
The big players here are KBB, edmunds, consumer reports, and all the car magazines. If they scream manufactures will listen.
The overwhelming majority of people finance their vehicles. It's not even their car to sell.