I'm afraid that HyperCard is too old for broader audience to be able to grasp how extraordinary experience it was providing.
As a 6-7yo I had a collection of English words, stored with my own definitions and pronunciations, using basic building blocks, and it was as easy and intuitive as writing these words in my notebook.
People used the same building primitives to make real games or stuff like accounting applications.
And the best part - at that time it didn't looked cheap.
This one is really hard to describe - it's the same uncanny valley that makes small village in Fallout 1 feel massive and full of people despite it taking two screens with just few sprites running around, while full blown 3D world of Fallout 3, with real buildings and voice overs felt flat, soulless and empty.
The Fallout analogy is perfect. Limitation stimulates imagination. I think that’s part of why essentially limitless AI models produce things that are so devoid of it.
It took browsers and web dev until, IDK, maybe 2010? to match the interactivity and capability of Hypercard circa 1994.
The actual killer app turned out to be the network itself, but for anyone who used and built things with Hypercard (a lot of people), all the patterns of components and event-driven development were like an echo from a refined past by the time it became part of the modern development toolkit.
the original Myst was created using HyperCard... which in and of itself is a crazy app with a huge impact on gaming in general.
>>> And the best part - at that time it didn't looked cheap.
This is one of the things that I think we've lost. Or at least that we come close to losing. I go back even further, to the text screens of mainframe computers, and text based microcomputers. Because everything was text on a screen, a kid like me could make something that "looks just like software" even if I couldn't match the sophistication of commercial software in terms of the inner workings.
By the time I started using a graphical computer, my 68k Mac, it was already getting harder. I could write programs that ran in a terminal window, but making them "look like software" required a deep dive into the impenetrable workings of giant class libraries etc.
HyperCard was a great middle ground. Its widgets looked just like the basic UI widgets of the OS, and users could do things like click on buttons and edit text fields. Just like software.
Visual Basic got there too. I wouldn't say that VB (and the OS it ran on) was conceptually better than HyperCard, but VB got supported and HyperCard got dropped.