A (former) friend of mine owned a MiniDisc recorder and he did store quite a lot of music on them, however as MiniDisc fell to decline soon, he soon couldn't buy new discs anymore, which was kind of a bummer for him. The RODs would (like CDW and CDRW) mostly contain 640MB, which was quite a lot back then, so I was pretty much interested in them.
Now I must say when it comes to Chriet Titulaer who set place up where I saw the RODs first, is that in his TV show "Wondere Wereld" (means "Wonderful World" in Dutch), he showed many prototypes of inventions that never came to be on the market, like video discs as big as a LP record, although we can say that DVD was a bit of the same thing, only smaller and better. He did however predict that we would in the future all be connected on a network of glass fiber wires, and that prediction wasn't that inaccurate. I must say that I was really sad when he passed away. He was the guy who triggered my interest in computers when I was a boy so a part of my childhood died with him. But his show made clear how many failed project, or projects that were in potential good, but already surpassed by something better before they were ready to be shipped.
Well, I see you made a living of programming. I've always been a hobbyist, but yet a professional coding trainer did dig through code I wrote when he was tutoring me some JavaScript, and did say that I was good enough to work for big companies like Philips... That really amazed the heck outta me, tbh. But I guess that makes clear why some areas in this field are still abracadabra for me... I am an autodidact after all, and as an autodidact you'll always miss stuff a professional trainer wouldn't.