Regarding your notes on `railway=razed` saying

> Nach Stilllegung Abbau Ueberbauen der Gleise bitte Kanten nicht loeschen sondern in railway-disused -abandoned -razed aendern!

This is to be disputed. Mapping a feature without any physical, verifiable presence is considered out of scope for OSM. OpenHistoricalMap (https://wiki.openstreetmap.org/wiki/Open_Historical_Map) can be used to preserve history.

However, you also tagged some disued railway lines that are not razed as `railway=razed`. Those of course are within scope to stay.