I agree with you. I was a huge fan of Minidisc, and even had an MD-related business in the early 2000s. However, as others have said, it was really only (relatively) unsuccessful in the US. It was hugely successful in Japan, and only faded out as the iPod made it obsolete for music listening, and (slightly later) flash recorders took over the market for field recording.

In Japan, you can still buy blank minidiscs in any normal electronics store.