Conversely, I pair my phone once when I get the car and I never need to worry about messing with it again; it's just connected when the car starts. I don't even need to take my device out of my pocket or bag.
On top of that I get hands-free calling if someone calls while I'm driving, I get steering wheel media controls, I get voice controlled media selection (play playlist foo, play artist bar, etc.)
Additionally, modern Bluetooth devices have very little friction in my experience.
However if more than one person will use the car (incl. as passanger) the annoyance of Bluetooth is even worse.
We have a dongle in the car that is protected by a sworn oath to never be removed from the cabinet along with some charger cables.
There is just so much stuff that can make the abstraction of automation leak and you have to spend more time fixing it this one time than saved in the total lifetime of the car with a simple cable.
A USB to jack left fixed in the car is not much of an imposition. Even less so if it can be combined with a 12V adapter for charging.
Your low tech car will feel like a emotional prison. Of all the annoying modernities you want the worst one? If you want to make a deal with the devil I would choose rear camera.
Think about it. All the headache and time to pair Bluetooth devices over a dead simple connector.
I would aim for a pre 2016 car. I think that has some margin to the Internet of Shit product lines?