Heh I'm so unknowledgeable about pre-OS X that, while I'd heard about HyperCard, I assumed it was a hardware thing like ExpressCard. I had no idea it was actually for software development.

Sounds like in theory, yeah it should be completely recreateable. A scripting language strikes me as pretty modern for the 80s, it would be very cool to see a reimplemented interpreter. I look forward to hearing more about it!