Do Bulk Records Pipelines Make Simultaneous Updates?

Hmm... this is an interesting one. I don't believe we can rely on the timestamp to be the same for all the records. The records each take some time to process, and we also can't rely on them getting updated in order, so the timestamps will definitely be off by seconds, if not minutes. 

Have you considered adding a step to the end of this pipeline to tick a checkbox that triggers the notification? That way it's the last thing done by the pipeline.