There's a really cool Minecraft mod that's basically this, it's stack-based programming under the cool glyph drawing hood :D https://www.youtube.com/watch?v=PPFXoZzYlms

I really like this sort of thing.

Combining primitives to get complex system.

I think would be cool for some sort of procedural game. Maybe combining behaviours somehow.

But wonder if it would actually be fun or interesting. Or the generic different but sameness that is an issue with procedurally generated stuff.

Interesting, kinda reminds me of Brandon Sanderson's AonDor system https://coppermind.net/wiki/AonDor#Drawing_Aons

Ew, group theory in my magical fantasy. Like broccoli in ice cream.