Oh, I mentioned this in my blog post, but perhaps it bears repating. If cycle, repeat, and replicate were implemented behind-the-scenes with LazySeq as opposed to LazyCons, they would still implement the promise of identical elements for separate traversals, but would be more efficient. Also, range always returns a sequence of numbers which are inherently identical when equal, so that would be another one that makes sense as a LazySeq. There are probably a few more that could also guarantee identity and would benefit from a LazySeq implementation (take, takewhile, and butlast come to mind). Is there any downside to making at least those changes?
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