Yeah I agree with your opinion on Gentoo/Funtoo actually. It's why I don't use them everywhere. But I do find them both to be very convenient for programming. For example, if you need a cross compiler for another architecture/OS, there is no distro that makes it easier than Gentoo. Also having all the configuration is just something that comes in handy every once in a while, and saves me the effort of having to compile libraries from scratch myself (which I end up doing a ton on other distros). That said, Gentoo/Funtoo are not something I'd want to use in a production environment because updating anything would mean hours of downtime.