Did you ever compare extra content from dvd/bluerays of the same films?
Like in 2008, when someone else you know had the same movie. Then you both got "shocked" to find out that the 3 deleted scenes on DVD A are not among the deleted scenes on DVD B.
Then you are both "shocked" again 10 years later when one of you finds behind-the-scenes material on YouTube and the uploader wrote "from the DVD" in the description despite this material not existing on DVD A or B.
Is there not enough space to add 7 deleted scenes and behind-the-scenes material on a disc?
If not, what are some of the reasons for not standardizing the extra content package?