@bjorng I posted a suggestion for an augmentation of the uniq function in the use cases thread: Uses cases? for proposed new lists functions - #10 by Maria-12648430. I think something like this is necessary to make uniq more than just superficially useful. At the same time, I fear that it will take a lot of the steam out of the pre-filled map approaches discussed here, or make them impossible even (sorry 
).
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