I researched them on Wikipedia, and I think I might have seen one in the local Goodwill store.
(The other one, there are two of the stores in the city I live in. But it does not compare with the Goodwill computer store in Austin.)
You would not even be able to load a huge disk like that into a CD-Rom drive. Probally part of the reason they are so obscure is that they were competing with VHS video, Beta tape, and as well as it seems, that fight went in favor of VHS, until the advent of DVD, then slowly, VHS video tape slowly declined. Now the fight, even if not much of a fight at the time is with DVD and Blu-Ray.
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Yes? What is it? Ok. Now that is good.