MiniDisc was a huge success for Sony, and was the winner of the tape-replacement format war in virtually every country - except the USA.
It was so successful that Sony is still making blank MiniDiscs today. (Though they are not sold there, Americans can type MDW80T into eBay if they'd like some brand-new MiniDiscs.)
I grew up in the UK and for nearly a decade portable MD players were virtually ubiquitous on the Tube. Only the iPod began to end that era, and it certainly wasn't instant.