Honestly, this is making me want some sort of hyper OS on top of Decker. Some sort of Desktop/supervisor (I hesitate to say hypervisor) etc, where the programs are decks. Like, a Finder/desktop environment with folders where files can be stored etc. Decks can execute other decks. Mount deck images etc. Lil as a shell. Lil scripts as icons that can also be run with a double-click. I dunno, just spitballing ideas. Probably getting too sophisticated for a web app/authoring tool.
I also would eventually like to see a "home stack" feature like the original HyperCard where we could take several stacks (like zine articles) and put them all together with a parent home stack.