Is there a single event that fires on every model change in SolidWorks like there might be in Inventor?

No, there is no single event that fires on every possible model change in SolidWorks. You must subscribe to a combination of events like ModelDoc2ChangeNotify, ModifyNotify, RegenNotify, and MaterialPropertyChangedNotify. Together, these cover geometry, material, appearance, and rebuild changes.

No, there is no single event that fires on every possible model change in SolidWorks. You must subscribe to a combination of events like ModelDoc2ChangeNotify, ModifyNotify, RegenNotify, and MaterialPropertyChangedNotify. Together, these cover geometry, material, appearance, and rebuild changes.