Good solutions are actually possible (and available!), but for some reason almost no car companies adopt them. Or they do for a single model, never to touch it again.

I know at least one model of Skoda Fabia has a feature, where you can connect your phone (via cable or bluetooth), and it'll take the phone's Google maps and display them on the car's bigger screen.

Not a perfect solution, but infinitely better than just using a phone or the car's most likely outdated navigation. Entirely possible, but very rare.