Oh great, another boutique "simple and lightweight Linux distribution". This one will solve all the problems the others don't. Perhaps it's simpler? Or lightweightier?
Oh and it comes with its own glossary of silly names for things so you can feel ridiculous when talking about it too others. Neat.
From interview: it started as a research project. The author wanted a distribution that uses the least system resources with maximum performance.
He started with archlinux, moved on to gentoo and to go even deeper - found the infamous "linux from scratch" and started to shape his own distro.
First time I hear about yash. What about dash (the only one I heard about in my reply). I see mrsh (minimal shell) exists too and is even strictly POSIX compliant, while yash adds something else? According to the comment here: https://news.ycombinator.com/item?id=18778448