[How to close my user account?]

I am no longer interested by Funtoo since I became interested by Guix. Could you close my account?

[The command groups <user> reports double entries]

See https://bugs.gentoo.org/637674

[Mininal and Optimized Stage3]

A complex job (e.g. build a custom distro) can be done by simplifying it but some people prefer to create similar distributions rather than writing a book or providing tools.