BUR #16086 has been rejected.
create alias rooftop -> on_roof
rooftop is frequently being misused to denote a character/pov on top of a roof instead of the lesser-known on_roof. if you take a leisurely scroll, you will see 99.9% images of what should be on_roof and maybe 3 or 4 actual buildings with rooftops visible from a higher elevation, like in a cityscape or other scenery scenarios. there is arguably no value in a standalone tag to describe what rooftop should, as obviously all buildings have rooftops, and tagging them would be as trivial as the old eyebrows_visible_through_hair.
rooftop should be aliased to keep people from continuing to mistag it, and I'll go through and garden out the few posts that used it properly later.
edit: if having a second tag for just... buildings with roofs is needed, that's fine, but there needs to be a clear line drawn between the two and a way to keep people from using it incorrectly.
Updated