Maybe it’s a French thing. Were your rentals somewhat upmarket cars, not the cheapest basic model available? In Greece (Crete) in 2019, our car had a plug in, stick-to-the-windshield GPS device. It was more trouble than it was worth, with difficult graphics and unreliable internet reception. Renting in Italy in the fall of 2021, we were unexpectedly “upgraded” from a small economy car to a Ford Puma (maybe the only car they had?), and it had Navigation built into the dashboard, along with novel things like displaying the current speed limit on the dashboard, and displaying the car’s speed with digital numbers, rather than on a speedometer. The speed limit part was sometimes useful, but it didn’t always match the limit posted on signs along the road, or it took many seconds to change on the dash, after the roadside signs changed.
As for the navigation system, we tried it for a while. Setting up the voice prompts in English was easy. You could even pick a male or female voice, and, I think, British, American, South African, and other accents. It would say to “bear right,” rather than to “exit” on a highway, which was disconcerting each time.
Subsequent trips with car rental but no included GPS were Italy 2022 and Ireland 2023. Later in 2023, Norway, was an all-electric VW. It had all digital displays, including a navigation program and map display, which helped getting around fjord country, mostly for providing an ETA for the destination, but sometimes for trying to locate a compatible charging station.
It looks like this won’t be an option for you, but our best strategy the past several trips has been for my husband to do the driving, and me to use Google Maps navigation, on my iPhone, calling out exits on highways and roundabouts, and how far until the next change in direction, and whether it would be a right or left. He could focus on other traffic and keeping eyes on the road (especially when that was on the left side of it) and not having to worry about whether we were on course.
The bigger display of an integrated car GPS beats a small plug-in, but it can still involve fiddling with entering destinations, orienting the display, and the driver potentially having to monitor it while operating the car. Not every rental car in Europe has GPS (or electric windows). Every car does seem to have an elaborate radio system and display, which we don’t use, but it’s sometimes hard to get rid of it to get to the heater, defrost, or other controls.
A smartphone can be a good thing for navigation aid.