Why are so many players speed running Expeditions now?

Genuine question, it seems like everyone is in a rush to complete Expeditions now, or plans out exactly what to bring to make it easier and quicker. I just don't get it, I bring the basics and some extras, but I dont go out of the way preplanning what to bring. I find myself waiting for the next Expedition once it's completed anyway. So is there a reason or benefit that I may be missing?

Genuine question, it seems like everyone is in a rush to complete Expeditions now, or plans out exactly what to bring to make it easier and quicker. I just don't get it, I bring the basics and some extras, but I dont go out of the way preplanning what to bring. I find myself waiting for the next Expedition once it's completed anyway. So is there a reason or benefit that I may be missing?