Can we talk about the large scale change of natural=landslide to hazard=landslide? The way I understand the keys, hazard=* is for things that are an imminent danger. If a landslide is old enough that it hasn't moved significantly in a long time, it doesn't seem to present any imminent danger. That would seem to be the case for many (all?) of these features. In this case, the natural=landslide tag seems to be describing the landform created by the landslide. Were you thinking something else?