Thank you, but unfortunately…
I know you said
search engines can still support searching for it, and Nominatim does
But I was hoping this would include the commonly used mobile apps. I tried both with Organic Maps and OsmAnd, and neither shows waldapotheke misburg:
(Of course I made sure to download the data for the Hannover region)
OrganicMaps:
OsmAnd:
(Will add it in the next comment, usual new-user restriction)
So, it seems that using old_name is not what I was looking for.
Btw, do you have examples using the disused: lifecycle tag prefix? (I mean, that have been in OSM for > 2 week, so they should appear in every Organic Map)