When using a Spatial Map Series on a dataset it would be very useful to be able to just use the ObjectID as the "Name Field" and "Sort Field" parameters. Not all map series layouts are going to be on specifically named features. In my use-case I just want to make a layout for every single feature in a dataset and the easiest way to do that is to use ObjectID. ObjectID also acts as the best way to determine what layout is for which feature because it is a unique identifier.
I realize that one way to do this would to to transfer the values to a integer field, but I'd much rather use ObjectID as I am using Production enterprise feature classes that are seen by our entire organization and I don't want this field to be visible and I don't want to maintain it.
As an expansion on my use-case I've thought about using Arcpy.MP to keep an up to date map series layout for every feature and with ObjectID I'd be able to instantly tell which features have not had a layout yet.