Mezzano, an operating system written in Common Lisp (github.com)

Related. Others?

Mezzano on Librebooted ThinkPads - https://news.ycombinator.com/item?id=28880888 - Oct 2021 (46 comments)

Mezzano: Operating system written in Common Lisp - https://news.ycombinator.com/item?id=26051255 - Feb 2021 (68 comments)

Mezzano (LispOS) Release Demo 5 - https://news.ycombinator.com/item?id=23950558 - July 2020 (2 comments)

Mezzano – An operating system written in Common Lisp - https://news.ycombinator.com/item?id=20210227 - June 2019 (136 comments)

Common Lisp OS Mezzano – Demo 4 - https://news.ycombinator.com/item?id=17633626 - July 2018 (1 comment)

Mezzano – Common Lisp OS: Demo 3 released - https://news.ycombinator.com/item?id=14072121 - April 2017 (22 comments)

Mezzano – An operating system written in Common Lisp - https://news.ycombinator.com/item?id=12358177 - Aug 2016 (63 comments)

Mezzano, an operating system written in Common Lisp - https://news.ycombinator.com/item?id=8955140 - Jan 2015 (15 comments)

Mezzanine: A Common Lisp-based 64-bit OS for VirtualBox - https://news.ycombinator.com/item?id=8943709 - Jan 2015 (63 comments)

why?

Don't we already have Emacs :p

All in all, cool!

Latest release is from five years ago, unfortunately. The project seems mostly abandoned.