Such frequent placement of nodes creates an impression that they were mapped from a really high-quality data source. While in reality in some places they drift from the actual path or follow gps noise.

I think in some places where nodes are too close, they could be cleaned up. For example https://www.openstreetmap.org/node/12222260553

 Also there are places with quite straight segments, but they still have multiple nodes in-between. For example this node
https://www.openstreetmap.org/node/12222260272