So if I understand correctly, ludicrous mode covers the same / similar use cases as the bulk loader / live loader, i.e. one time bulk data ingestion. It is not intended to be used to incrementally update an existing graph, i.e. incrementally adding, updating and deleting (existing) nodes?
My use case requires both one time data ingestion and incrementally updating an existing graph. Unless I can somehow change ludicrous mode programmatically from the client at runtime (after the ingestion phase that is), that sounds like ludicrous mode does not fit my usage scenario.
I can open a Github issue of course. Do you think transactional upsert support in ludicrous mode is a feature request of a bug?