Here in the Czech Republic, plenty of government geodata is open (not all for now), but merging datasets is hard, so OSM contributors only do occasional manual

Here in the Czech Republic, plenty of government geodata is open (not all for now), but merging datasets is hard, so OSM contributors only do occasional manual imports. It serves as a valuable base and could be used as an OSM alternative on its own, but when you've already got OSM, which is generally more detailed and sometimes even more up-to-date, why bother?