[bmillare]

for me, (just started using it), at least 1 good case is traversing deeply nested maps without going crazy. Even when looking at nested structures from other langs, easy enough to write a converter and then use this to inspect. Also if the datatypes are special, you can have it expand in other ways like links to browser, or other custom view types. That alone seems pretty useful. You can make GUI like behavior with just adding some metadata.