Not just the car-bike segregation, but the bike-pedestrian segregation. In UK they just paint a white line down a pavement and call it shared use… put all the bikes in the “kids not looking when they open the car door to go to school” zone, rather than in the road with the “school mums not looking when they pull in/out” zone.
In Netherlands a “shared use” bikepath/footpath is often clearly marked, different surfaces, small kerbstone between the two. Pedestrian bit paved, bike bit in orange tarmac. And then often something (hedge etc.) between cycle lane and road.
Not sure how easy it would be to change the mindset of Brits either, with regards to bikes having RoW to cross T-junctions. And then roundabouts… having to give way at exits to the crossing cycle lane. That’ll never happen in UK.