@CuteFerret @itsfoss They are already supplying them: https://www.gentoo.org/news/2023/12/29/Gentoo-binary.html

However, there are many packages that aren't available as binaries, and for those that are available, the USE flags of the binary have to match, otherwise the package is still compiled locally.

I've just done an empty-tree rebuild (upgraded to the new 23.0 profile), and while I haven't counted, I'd estimate that about half of the packages were recompiled, and about half of them downloaded.