Gentoo is mostly just BLFS and ALFS from there, with more available packages, and centralized 'USE FLAGS' ( https://wiki.gentoo.org/wiki/USE_flag ) which could be considered one of Gentoos USPs.
77pt77
Try doing it in 2002 with old hardware.
Xorg took forever, especially the fonts for some reason.
SilentBang
I should also and the most longest too :P
But also WTF systemd?
Gentoo is mostly just BLFS and ALFS from there, with more available packages, and centralized 'USE FLAGS' ( https://wiki.gentoo.org/wiki/USE_flag ) which could be considered one of Gentoos USPs.