Best for: A new plugin or technique for digital artists.
Correction: Even a true tool has limits. 3D volumetric layers, video layers with motion tracking data, and certain RAW filter smart objects sometimes require a manual re-link. However, the best exclusive tools offer a "Force Clone" mode that brute-forces the copy.
The script is primarily known for its speed and simplicity, working directly from the timeline rather than requiring a complex control panel.