OSM Carto maintainers refusing to render approved `highway=busway`

This particular derivative was authored by MapTiler, with one subsequent contribution by an unaffiliated developer that was intended to improve consistency with the original OSM Carto. Neither MapTiler nor the other OpenMapTiles maintainers have said much about their long-term plans for this style’s active development, just that it’s intended to be a reference implementation of an OpenMapTiles-based style. This is not to cast aspersions on anyone, but since there isn’t much of a public track record yet, it’s very tempting to project hopes and desires upon the project that also don’t come with enough material support.