(Three in a row here, I’ll keep quiet in this thread after this until someone replies).
There ARE such things in “logical rail networks” (across Europe, across North America…) as truly continent-wide spanning rail aggregations. In USA we do this by putting multiple
route=railway relations into a super-relation, such as Relation: Northern Transcon (7403813) | OpenStreetMap, but these are relatively rare.
There are NOT such things in “logical rail networks” as truly continent-wide spanning rail aggregations which include proposed and under-construction segments as part of a “planning corridor,” as these do not really denote anything found in reality, but rather are more like data beasts for political planning purposes. We do not map those, and the original examples in this thread topic were found to be such things, so they were rightly deleted from our map database.
If the Rhine-Alpine Corridor CAN be shown to be a reality-based “railway corridor (aggregation),” such as the USA has (rarely) in instances such as Northern Transcon or Mid-America Corridor, I’d like to see these replicated all over Earth in OSM in the same way as we do so in the USA: as super-relations of “middle level”
route=railway relations. These must be active rail transportation corridors, not for planning, not with construction zones, not with proposed segments, but ACTUAL rail infrastructure and ACTUALLY “logically aggregated.” (By a rail company or national railway entity).