Knotenpunktnetzwerke

(The Belgian forum has just discussed this again). Here is (slightly edited) what I posted:

So the first use case (long theme route) failed: unmanageable for long routes with many node2node sections.
Example (look at the sections in the information panel): https://hiking.waymarkedtrails.org/#route?id=9576945

The second use case (local loops) turned out to be beneficial. The node network actually benefits from the colours, and the loops benefit from the node planner. You can see the colours (colour=* on the node2node relations) in the output of the Knooppuntnet Planner.
Compare:
https://hiking.waymarkedtrails.org/#search?query=enschede&map=14!52.2936!7.0487
https://knooppuntnet.nl/nl/map/hiking#6cid37-1sxwo4a-1af08on-5777a2