If you have been following alternative operating systems for a while, there is a good change that you have herd of Hurd. It has been in development since before Linux, and yet it is still not stable. This kernel with a super cool logo is super powerful. I am going to tell you where you can get it, why you might want to check it out, and some of it’s drawbacks.
In 2016 or 2017 in a conference in Spain with people to which I was in contact got Debian GNU/Hurd working in a Netbook perfectly.