Interesting mixing up of "an object" worth collecting and "the documents" such as director interviews, deleted scenes, commentaries, etc - also worth collecting

Interesting mixing up of "an object" worth collecting and "the documents" such as director interviews, deleted scenes, commentaries, etc - also worth collecting but in what sense? I mean the documents are the same if they are digitally on blu-ray, DVD, disk drive or cloud (okay, not cloud), and they do take effort to round up. All the more so that if you are going to do so, you are not going to limit yourself to what's on the approved DVD, you will also hunt more obscure stuff. Meanwhile, "object" editions are highly suspect from a collecting point of view since generated by a marketing machine. And the documents are often very hard to get to because ignored by the online platforms. The opinions reported are interesting but what a mess for now.