According to Mackenzie, Sony’s decision to quit the recordable Blu-ray business (as well as MiniDiscs, MD data, and MiniDV cassettes) has little to do with the overall market of “packaged” movies and TV shows available on Blu-ray.
As Mackenzie explains, the types of Blu-ray discs that Sony won’t make any more are “home-recordable” discs, like the blank DVD-Rs and CD-Rs that many of us used for burning photos, MP3s, and other media to disc. That’s very different from the BD-ROM discs pressed in factories for the big movie studios and the smaller, boutique Blu-ray labels.
Thus, the Sony news isn’t about how streaming is muscling out Blu-ray, Mackenize argues. Instead, it’s about how cloud and flash storage has decimated the market for blank Blu-ray media.
https://www.pcworld.com/article/2588333/no-sonys-blu-ray-exit-doesnt-spell-the-end-for-physical-media.html