where this wiki page claims that? in fact one of examples is showing abandoned building where it is NOT abandoned: prefixed
And:
- A simple feature such as a building that fell into decay might be tagged with
building=yes+abandoned=yes. This is fine and preferable over lifecycle prefix as long as it is still a building.
and building ruined enough to not be a building anymore does not really qualify for abandoned:building - it is rather ruined:building