Interesting question @leonid.smidt!
In my small “private museum” these “very old macs” might just run well… and if I get some time to spare, I’ll insert the diskettes and see if they still fire up!
To study Hypercard, once in a while, on my modern Mac - I use Running a Hypercard stack on a modern Mac | James Friend. Thank you, James: your effort is much appreciated!!!
This worked well until Mojave (MacOS 10.14). But today - I just tried it - Catalina (MacOS 10.15) lets me down…
The point for me is, that I can still analyse the “conceptual model” of Hypercard in detail to keep my focus as a “trendwatcher”…
What might be useful for the “Obsidian folks”?! In my opinion this is a “reference project” worth studying, to ignite creative ideas about the direction Obsidian could take…
As always: have a nice day!