Great question Martin to make sure what the feature can be used for. You should only deploy this if you intend to perform a database attach upgrade from SharePoint 2010

This used to be in the old installation guide, but I see the new one is not as specific. I'll see if it can be updated.

Is this the same solution package you were asking about? Does this help answer your question? So it would be depending on your migration scenario if you will deploy this solution.