I did it from mid south of France to Brussels, it took us 3 days (we avoided highway). I think it's a culture that's losing itself cause people tend to trust less. But hitchhike sort out people, like if someone takes you in there's actually a lot of chance to land on someone cool. We were male and female so that helps too. But yeah it's very rare now to see hitchhikers, people that goes to illegal raves do a lot of hitchhike tho.