If I understand correctly, many of these named routes started out as actual tours that someone once published online. Maybe people even used to follow these routes at some point. Some of them follow common-sense routes that may well become USBRs without modification at some point in the future. But I don’t think OSM should be in the business of speculation about the future.
This “Ramblin’ River” tour follows a road in Northern Kentucky that used to ramble right into the river below after every major storm, forcing KYTC to more or less abandon the road for a few years. When I closed off the road and detoured Kentucky Route 8 around the area, I didn’t quite know what to do with this bike route. (Currently, the road is currently in a somewhat better state of repair as Kentucky Route 6335, the highest number in the state – in other words, the least important route in the state.)
As far as I can tell, no relevant agency or organization promotes this tour as a specific route anymore, not even the local tourism boards. It only has any notability as a corridor for a future USBR. Should we delete the route relation to avoid further confusion? And does this situation inform our next steps regarding the original topic, the Pacific Coast route?