Arguably off topic, but anyone that thinks on-disc custom menus with interactive content are a good idea should have watched my grandmother try to just play a DVD. Pop the disc in, hit pay. Then after wading through unbypassable FBI warnings (how can they even get away with some of the things they claim in those messages?) and previews, you finally get to the movie. Erm no. It's video loop with an integrated menu. She could hardly remember which remote was which, let alone what button did what. Trying to explain to a hearing impaired person how to play the video was always very interesting. Sometimes hitting play again worked, sometimes it didn't. Turn on CC? Very difficult for her. In many respects the old VHS was way more usable for her. Put it in, hit play, hit the CC button. Call it good. interactive blu rays would probably have been completely unusable to her.
I learned a lot about technology over the years watching her try valiantly to interact with it. She did an admirable job for someone in her 90s (She learned computers with MS-DOS in her late 60s, so she's always had aptitude for it), but it made me realize most modern technology seems to be developed by 30 something year old hipsters who never think they will grow old and decline cognitively, or decline in terms of physical dexterity (drag and drop, double click, or any modern tablet action). Things that are obvious to me and easy now will be much harder some day. But never to worry. The next generation will roll their eyes and push buttons for us (or touch screens) while rolling out their own hip technology that we're just too old to appreciate.