very well made :) for documentation and specific dashboards this has a lot of great uses

i played with a similar concept back when everyone was starting to 'drill down into big data' on their ipads, and i never came up with a clever way of drilling 'sideways', or allowing people to go between one 'insight' from one deep level and tie it into another without zooming all the way back out and then back in, contextual 'wormholes' (all handmade), or breadcrumbs (messy after enough layers)

one thing i'd add to the demo is detecting where i'm hovering over while scrolling to scroll into that part (on a mouse), scroll out works