Seems like the purpose of this product is to help assist in the forcing of the modernized effort in SharePoint Online.
Create web parts that coincide with the classic team sites that everyone used and now are being forced to use modern sites. Example: script editor. We lose the script editor when moving to modernized. Obviously we paid for it and used it in classic sites, and it is no longer available in modern. The product is diminished. We should be able to pay less for the product now since it is no longer providing the same quality/quantity of applications to use. Not pleased.