I've just stumbled across OpenStreetMap France and was amazed to find that it has 2 extra zoom levels, 19 and 20, whereas OpenStreetMap only goes up to 18.
In our application we display potentially masses of geographic data over the top of basemaps. We use Ordnance Survey and OpenStreetMap. The Ordnance Survey mapping we use we can render off at higher zoom levels, which will (once we've upgraded our GeoServer) allow our application to zoom closer and see greater details in the overlaid data. But by default we use OpenStreetMap as it is quicker, looks better (especially far zoomed out) and we like trying to get people to use OSM. Sadly this means we can only go to zoom level 18 (unless I do the OpenLayers thing to 'force' it to zoom in which drops the resolution).
However, if we were to use OSM France we could get those extra zoom levels, and as far as I can see it is (almost) as quick and doesn't appear to have any language diffrences (apart from London being displayed as Londres, which I am not concerned about as we are based in Dorset).
I guess my question is twofold.
1 - Can anyone think of a good reason for me not to use OSM France
2 - Why doesn't standard OSM have these two extra zooms (capacity?) and will they ever?