ISeq is considered to be harmful, because partly due to ISeq over use Clojure's code is cluttered with unnecessary and costly (making a new copy) "casts" (or wh

ISeq is considered to be harmful, because partly due to ISeq over use Clojure's code is cluttered with unnecessary and costly (making a new copy) "casts" (or what a proper clojurian term for this?) from one kind of a container to another. There is an opinion that classic lists, sequences (only on lists, vectors and strings) plus series are good-enough.