I'll look into this. Since I wrote that initially, the no-streets OSM map was discontinued so I switched to Mapbox & Maptiler. But I do use two full layers (one

I'll look into this. Since I wrote that initially, the no-streets OSM map was discontinued so I switched to Mapbox & Maptiler. But I do use two full layers (one custom one without street names) rather than doing what you suggest. Hopefully it's not a paid feature.