> it can hide the StreetComplete address quest for the building

I am an "excessive" StreetComplete user (was once even #1 user in Albania :-) ) and don't see this. However, SC is just one app, there are many more. I also reported already several bugs to SC to help improving it.

You have not replied to my main point: I map to:
* benefit personally to later find addresses, routes and info (I now live here)
* to help the shop owners

For both it is important that the info is available and there is no reason why the house a shop is in should be used to provide info. This info: house address is also shop address might be true for Sofia, or maybe not or maybe not for all Bulgarian municipalities and what about in general? No app in the world can find out that local rules might apply (house numbers, PO-box numbers). Therefore mappers should be encouraged to collect as much info as possible.

And again, if a shop closes, the node can simply be removed or changed to the successor. If a shop moves, of course a node must then be updated - updated location is logically also an updated address.