While that could help, I don't see why records and tuples are necessary. We added symbols precisely to deal with this issue in a backward compatible way. We could add symbols for set/map protocols using `equals` and `getHashCode` which would enable any objects to get set/map deduplication functionality. Those implementation could then be the mechanism how its implemented for records and tuples.

If this is a bad way to do it, then why isn't TC39 working on a better way to implement protocols / traits in JS?