Here’s a section of a large city where I’ve been doing a lot of building cleanup.
JOSM Filters showing me all the building=yes:
Can you guess which roads I did cleanup in? 
And here’s the other side of the city with building=yes filters ON/OFF:
Only showing:
building=house | building=semidetached_house
building=garage | building=shed
See all that dull pinkish color in the NW section of the gif? I think there’s a lot more garages/sheds hiding in there!!! 