The change would only affect longer series, as well as classic series or already-released series that don’t have an HD master.
Discotek Media, known for releasing longer classic titles like the Mazinger franchise and Marmalade Boy, are looking to fans to decide whether to continue to release DVD boxes for all titles, or to switch to SDBD for some.
Movies, OVAs, and short subjects would not be subject to the change, nor would modern series created in HD.