Do you mean in the API? I live in an European country and I don't think I ever saw an asphalt road without paint lines. This varies a lot between countries though.

Does Italy count? https://upload.wikimedia.org/wikipedia/commons/0/0c/Google_M...

Many American roads don't have lines. Residential roads, parking lots, many business driveways have limited markings.

Then there's roads with just the center line markers with no road should markings.

Then there's a whole class of roads of lines over "demarked" old lines that weren't demarked well, or lines fading that should've been painted a long time ago.

I'm surprised you've never seen a non-perfect road?

Here in Bucharest there are quite a lot of big boulevards that do not have them, either because they haven’t been repainted over in a long time or because they laid new asphalt without bothering to repaint the lines (this happens a lot, unfortunately, and is very frustrating).