Following question has been put on hold for being primarily opinion-based:
I think this might be based on the estimation that cartographic visualization advice is mainly based on someone's taste. But this is not true. There are rules in thematic cartography. Some are clear some are a bit more fuzzy but they exist. I admit there is sometimes more than one solution but there are clearly good and bad ones with respect to what one wants to communicate with a map. Many users that come from an IT or primarly GIS perspective are not aware of these rules. Where should they ask if not here?