Hint: it's a dead end people! Been around forever as an idea, lots of academic studies and some industry apps. Doesn't really work and has never taken off despite many attempts. Many reasons for this, including the real world doesn't include zoom at multiple orders of magnitude, going in all planes is harder than a linear list for people to scan, semantics in 2D isn't something that's easy to grasp cognitively unless you specifically arranged things that way (which isn't the case for this kind of software, and even then you can lose what's happening / adjusting everything to account for something new isn't well supported), and not many use cases where this is broadly useful (especially compared to other tried-and-true approaches).