Geodatabase mechanisms that make FCs unusable in ArcMap

[Bud]

What ArcGIS Pro geodatabase mechanisms make an item unusable in ArcMap?

1. Attribute rules
2. Branch versioning
3. Contingent values
4. New field datatypes
5. Parcel fabric 

Anything else?

I’m aware that ArcMap support is ending. But ArcMap is still useful for troubleshooting purposes for select users.

[George_Thompson]

I would add Utility Network, Updated Annotation (I think) to the list

[Bud]

New Geodatabase Features Add Functionality But Complicate Compatibility and Interoperability

[George_Thompson]

Not sure this meets all the needs but a start...... https://enterprise.arcgis.com/en/server/latest/manage-data/windows/client-geodatabase-compatibility....