While rabbitholing down in this thread*, I remembered a #crazyidea I think I've only written down as a note on my phone. "Programming on a Grid" as I call it. Kinda like redstone-stuff in Minecraft, except full-speed and with arbitrary levels of "zoom" - i.e. you can abstract common operations into single-tile blocks, and instead of 1bit wires, wires are typed and define the content travelling on them.
It's kinda like signal processing, but more game-like.