With respect to this way: https://www.openstreetmap.org/way/1171450764

As I understand it, the usual practices here are to use disused if it's "in a reasonable state of repair but ... currently unused", and use disused:old=tag if it's still obviously a disused old=tag (here, shop=car_repair), or just disused=yes if it's no longer distinguishable as such. (I think the latter is more appropriate here.)

You do have a building tag already, so I think disused=yes is best here. (Note that disused=building is very rare on OSM.)

I can't tell how good of shape the building is in from the street but abandoned=yes is even better if it's falling apart.

Thanks!!