Scapple is built on a leaf topology. Hatpnole described a grid topology like that of the Corkboard. I happen to share that preference, and yes we have batted around this topic before. See this illustration of how a Kanban grid can be used to shape stray ideas into a more-or-less coherent narrative. Within a Scrivener editing pane, no less.
Hatpnole, my grid-based thought arranger these days is ImDone, web site imdone.io . It’s built primarily as a task manager; I’ve just repurposed it for thought snippets. Took a bit of custom CSS to match the card color capabilities shown in the link above, and AutoHotkey code to enable editing the cards in place, though integrating a similar mechanism into ImDone proper is on the developer’s road map.
Rgds - Jerome