>What seemed crazy was how they could be so much better than trees, which to me were intuitively the most efficient way to store data. Trees (sorted) are good

>What seemed crazy was how they could be so much better than trees, which to me were intuitively the most efficient way to store data. Trees (sorted) are good at finding subsets and ranges "scanning" or "searching" but hashmaps are better at "seeking" like a key-value lookup