landuse=residential classifications: There are several different that could fall under this... single-family, townhomes, apartments, high-rise apts/condos, mobile homes, etc.

A clearer definition of the difference between landuse=commercial, =retail and =industrial. Lots of offices are considered in zoning as 'light industrial' and called 'industrial parks', as opposed to 'heavy industrial', traditional industry with smokestacks and factories.

Fraternal lodges/meeting halls: Still lots of these around, though many of them are quite old, not just the buildings, but the average age of the members.