I hear and read quite often these days that people will use Acquire Coordinates on an imported file and then remove the link. They import the source file again but use Positioning: Auto by Shared Coordinates. The reason offered is usually that they are doing it because they want to prove to themselves that the file IS sharing coordinates.
It is NOT a necessary step. Don't bother to do it. It won't harm your project if you do, it's just pointless.