This feature would allow you to remove some IDs from your product database and thus lighten your database and improve your website's performance.

WHAT'S THE PROBLEM?

It´s impossible to delete IDs variations that include a deleted product attribute.

This happens when you delete one product attribute in a given point of time. Its product variations won´t be deleted. The feature "Orphaned variations" won´t help because the product still exists, but not the product attribute you have deleted.

This feature would look for all variations that include a product attribute that is no longer used by its product variation. Then, it would delete those variations.