way/1114875159/history has shop = landscaping

shop=landscaping ? What kind of shop, if any is here? Is it selling landscaping supplies? Or is it office of someone providing landscaping services? Or is it something else?

would shop=growshop tagging fit for node/11060578312/history ?

node/12397895161/history

is it a factory? shop? office?

(asked on changeset/159959169 and got ignored)

way/58755551/history has shop = plaza

shop=plaza ? What is the meaning of that shop value? What kind of services or products are sold here? Is anything from shop=* or osm.wiki/Category:Tag_descriptions_for_key_%22shop%22 fitting? Maybe new value needs to be invented? Maybe this data is wrong and there is no shop here? Maybe it is not a shop but something else?

mtb:scale:uphill=-3
was used here, see way/922997617/history

Maybe
mtb:scale:uphill=3-
was intended here?

I am pretty sure that it is a typo, but not sure enough to just replace it (I edited some objects where situation seemed more clear to me).

Or maybe this value was used deliberately? In such case, what was the intended meaning?

If you know it is a mistake - can you fix it?

mtb:scale:uphill=-3
was used here, see way/492557879/history

Maybe
mtb:scale:uphill=3-
was intended here?

I am pretty sure that it is a typo, but not sure enough to just replace it (I edited some objects where situation seemed more clear to me).

Or maybe this value was used deliberately? In such case, what was the intended meaning?

If you know it is a mistake - can you fix it?

way/563461620/history is tagged as building = proposed

Is this building existing now? Are there at least real plans for building it? If there are no serious plans for it - that should be entirely deleted. If construction started then building=construction is a better tag. If construction is upcoming then source for this claim should be tagged on the geometry itself (source tag, note tag) and different tagging should be used - we are mapping proposed features in OpenStreetMap very sparingly, not every promise or business plan should be mapped here.

way/502682850/history has roof_shape = flat

Maybe roof:shape=flat was intended here?

See roof:shape=*

way/724635671

amenity=self_storage ? Is it simply a shop=storage_rental? See osm.wiki/Tag:shop%253Dstorage_rental Or is it selling boxes/packaging?

If it is certainly shop=storage_rental - would it be safe to mass-retag it without inspecting individual cases for all objects tagged this way?

way/1086295833

amenity=healthcare ?

what kind of healthcare amenity is here?