Typical usage scenariosI remember registering a corresponding feature request in order to make it easier for XAF developers to accomplish the following types of tasks:
a) Validating data fields for new records only; e.g., the scenario from Q440548
b) Implementing different data field appearance for new and saved records; e.g., the color or enabled state as in Q475272
c) Managing Action controls' state for new records via TargetObjectsCriteria
During these years these three scenarios stayed popular among our users (we had several dozens of trackers), so it was a natural decision for us, as framework creators, to make accomplishing this common and proven stuff easier for developers and probably end users.