In the below I have never seen the status ever be anything other than successfully loaded which is a good news. However, I would like to know, what other possible values this could be if any? The idea being really if this status could be used to identify if a third party content or CDN has errors.
Hey Gary - this page has a bunch of good info:
You can create measures based off of these states. One issue I have a ticket open about is it seems like recent versions group 'interrupted' ones (where the page was left before the call completed) in with failed so one BT we had used looking for specific third party call failures was rendered less valuable. Regardless, the states are also shown in the image below: