I ride in areas with no network access. With no access there is no Strava map to see. Yes if you are lucky to have got a map on your device with network access you can use it, although the non network map is degraded. But, if for some reason you have to restart your recording, the map is gone. Really, Strava needs to have a way to download base maps and heatmap info, that can be used while recording a route.