I’m curious to see how they will handle immutability and what will it set apart from other distros like fedora atomic.

Most immutable distros have limitations on installing CLI tools because they are designed to have flatpak as the main package manager. It’d be cool if they had some tricks for installing software in the user/data partition like you can do with homebrew in bazzite, but better integrated into the system package manager (I’m imagining a gentoo prefix integrated into a unified package manager)

IMHO the power of gentoo is the customization, not the optimizations you can do when compiling. You can change the dependencies and config of software to get exactly what you want instead of a config somebody else has chosen for you.

I used Sabayon back in the days for a few years and you are expected to accept the defaults for most packages and use it as a mostly binary distro, but you also have the option to use emerge(gentoo’s package manager) to customize only some packages via USE flags. It was working quite well as far as I remember.