From the Release page:
memdraw and devdraw now support affine warp primitive with demonstration programs provided in form of games/rotzoomer and see also image(1).
new atomic(2) functions provided for arm, arm64, mips, 386 and amd64.
big stabilization improvements for kernel when it runs out of memory as well as complete overhaul of the mount and image cache.
irtio10 i/o bar support for openbsd vmd.
libc got rune normalization updated to unicode v17.
libsec now has blake2 implementation.
git got a new rebase utility.
troff got ported to native plan9 from ape.
I recommend reading their “Frequently Questioned Answers” document, aka Dash1.
https://fqa.9front.org/dash1.release.pdf
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.