As mentioned elsewhere in the subthreads somewhere here, I got a 2018 Audi A3 in 2019, wrote about the experience re data collection + that purchase here: https://news.ycombinator.com/item?id=42736918

Probably not the kind of car you are looking for, but my friend's 2015 honda odyssey (which he just traded in) had no smarts. No cellular, no GPS, console used knobs instead of a touchscreen... Whatever Deadpool's opinion of it was, it did make a great van for cargo and humans with good fuel economy for that class...

But, sooner or later it'll be a problem. What would be interesting to me is, is it possible to deactivate cellular on a modern car without losing key functionality, and, if it is ever reactivated (say, to pull updates) would it promptly push years of data upstream.

If you’re willing to do a little bit of work you can often remove the cellular radio from some modern cars to remove the data collection connectivity, not sure if it’d still be buffered on the device still but it’s a step in the correct direction. I’ve read about this in some modern BMWs so it might be worth a bit of googling if you have a particular modern car you are interested in. Or if no one else has done it with a particular model you could also blaze your own path here.

My second hand Citroën C3 originally sold on 2016 doesn't collect data AFAIK and has button and wheel controls. There is a small touchscreen (7 inches?) for configuration, trip data, radio stations etc but all controls are also on the wheel or around it.