This is becoming a common (but idiotic) meme... "Anything that had die hard fans, that didn't succeed - Way Too Early"

Maybe it was just bad technology or a bad implementation.

If it was really that good (it wasn't) then it would have survived. The fact that nothing of any consequence works this way today is telling.

You could only go so far with HyperCard before running into limitations and that's deadly.

It was easy for beginners but offered no advantage to experts. Once you graduated beyond HyperCard you could never go back.

Market death.