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I think it is awesome that KEEP-11 is finally being implemented in 1.2, which brings us the long awaited `chunked` and `windowed` functions.

While most of the proposal looks very solid, the `pairwise` is a bit controversial. It has two major problems:

1) The naming is ambiguous since the word "pairwise" may generally be used for 3 different things. More other, the proposal uses one of its rarer meanings.
2) It is unclear why there is a need for a separate function which does the work of `windowed(size = 2, step = 1)`. In addition, if a change to make `step = 1` the default is adopted, that alternative changes to a short `windowed(2)`, which makes `pairwise` even less competitive.

In short, adding `pairwise` does not seem to add a lot of value while creating an ambiguity. I believe we should exclude `pairwise` at least from 1.2 to see if there is as mach demand as expected. 

Here is the KEEP-11 discussion <https://github.com/Kotlin/KEEP/issues/11>