https://github.com/gravitystorm/openstreetmap-carto/issues/4...
Carto is of course just one style for OpenStreetMap, but it is also the default style shown on openstreetmap.org, with direct support from the operational team (server resources etc.). If a high-profile feature is not rendered by Carto, gaps show up all over the world where people use Carto-based screenshots, etc., and of course on openstreetmap.org.
The stagnation of Carto, and thus openstreetmap.org, the website, is one of the major pain points for many mappers and developers in the OSM community, including myself. (It also highlighted the failure of the OpenStreetMap Foundation to deal with this situation, although the recent move to develop a successor vector style is somewhat hopeful).
Personally, this makes me very hesitant to consider anything Christoph Hormann writes regarding OpenStreetMap in a positive light.