To speed up working with slow hardware and for overall convenience, we’re now also offering binary packages for download and direct installation! For most architectures, this is limited to the core system and weekly updates - not so for amd64 and arm64 however. There we’ve got a stunning >20 GByte of packages on our mirrors, from LibreOffice to KDE Plasma and from Gnome to Docker. Gentoo stable, updated daily. Enjoy! And read on for more details!
I can see it working if one wants to customize the compilation flags of a few packages they have strong opinions on, but otherwise don’t care about the rest of the system. Sort of like the binary cache in NixOS, where by default you use the binary cache, but you can customize parts of your system triggering a source-based installation for that parts.