[OttoCoddo]

I answered this question here: https://news.ycombinator.com/item?id=39801083 If that is not enough, let me know.

[out_of_protocol]

tar.zst vs pack is looking great, thanks! Also there is https://github.com/mcmilk/7-Zip-zstd

.pack vs zst-7z with the same compression settings would b interesting. That will be pure container overhead