I recommend reading their “Frequently Questioned Answers” document, aka Dash1.
fqa.9front.org/dash1.release.pdf

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I’ve read a lot of tech docs through the years. Hands down, this is my favorite.

I do not recommend installing their OS, unless you have time to kill and curiosity.
9front is completely useless. It’s a programmer’s toy; a sandbox to develop some OS build ideas.