[gentoo-dev] [RFC] Enable userpriv by default? Support RESTRICT=userpriv? Interaction with prefix in EAPI 3?

[Zac Medico]

Should we enable FEATURES=userpriv by default? If we do that then do
we also need to support RESTRICT=userpriv? Maybe RESTRICT=userpriv
should not be supported on the grounds that it is never justified?
What about prefix support (in EAPI 3), which often doesn't have root
privileges?
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Thanks,
Zac