On Sat, 8 Jul 2017 18:20:54 -0400
"William L. Thomson Jr." <wlt-ml@o-sinc.com> wrote:

> For anyone interested in such, I opened a feature request bug for
> allowing use of sets in profile packages. 
> 
> https://bugs.gentoo.org/show_bug.cgi?id=624300
> 

Subsequent bugs from the discussion

portage should not add system, world, profile, set, or dependent
packages to world, like -1/--oneshot
https://bugs.gentoo.org/show_bug.cgi?id=624628

Add warning message when -C/--unmerge a dependency like system,
profile, and set files.
https://bugs.gentoo.org/show_bug.cgi?id=624630

Thank you for all's input on this topic and related. This should
conclude the thread now, or at least my part. :)

-- 
William L. Thomson Jr.