I created a MapRoulette challenge that lets you find buildings that do not exist anymore:
This challenge lists buildings where
maaamet:ETAK have been deleted from Maa-amet dataset and not replaced by a new building.
It’s important to point out that some buildings have been deleted from Maa-amet map based on latest imagery, but are still visible in the official orthophoto. In such cases use kiirortofoto.
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Ce sujet de discussion accompagne la publication sur https://community.openstreetmap.org/t/maproulette-challenge-does-this-building-still-exist/104972