Do Bulk Records Pipelines Make Simultaneous Updates?

When bulk records are handled in a pipeline, are all of the applicable records updated simultaneously? Will they have the same modified date and time? 

I have notifications setup to be triggered when a date field is updated. I have a formula checkbox field used to identify the most recent record associated with an email address field value. The most recent record may not be the one that gets updated along with other records with the same email address field value. I don't want the email notification being sent before other associated records are updated. I am looking at using Bulk Record steps to reduce the number of pipeline steps I am currently using as well as handle everythingmore efficiently. I just need to know if I would be safe having the date field updated on the most recent record with the other potential changes without worrying about the email being triggered before all applicable updates are made.

Thank you, in advance for any input. Let me know if I need to provide a visual and/or more clarification on what I am looking to accomplish.