Which would mean "most of the features is contains remain “static” and unchanged" and being able to cache will be just as valuable to you as it is to OpenStreet

Which would mean "most of the features is contains remain “static” and unchanged" and being able to cache will be just as valuable to you as it is to OpenStreetMap. And, for the record, OpenStreetMap is not static. An enormous number of changes arrive to OSM daily from mappers all over the world making changes to keep the map up to date. https://munin.openstreetmap.org/openstreetmap.org/albi.openstreetmap.org/index.html#postgresql https://munin.openstreetmap.org/openstreetmap.org/albi.opens... And Postgresql is behind all of it.