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In light of Metosin's recent comments on the costs of laziness, what do you think about adding a transducer arity to vec? In essence it becomes an eager version sequence. Semantically I think (vec (map inc) coll) integrates fairly well with the idea of vec. That tiny bit of terseness over (into  (map inc) coll) I think is worth having personally.
(vec (map inc) coll)
(into  (map inc) coll)