Thought I'd open this since I've received questions for certain subtle omissions.

They remain unpackaged because they're

• Non-functional.
• Have problematic functionality in NixOS.
• Unsafe / untested.

Some of these might be tracked in their organization's project Distro-agnostic Pantheon

Always open an issue upstream 😄

switchboard-plug-locale

Status: Haven't tested this one for a while.

• We usually do this in NixOS configurations?
• plug cannot determine region and format correctly on fedora elementary/settings-locale#76

switchboard-plug-useraccounts

Status: We now have 9adfe4a.

• We usually do this in NixOS configurations?
• plug can't enable newly created user account on fedora elementary/settings-useraccounts#92
• plug fails to detect current user on fedora elementary/settings-useraccounts#91
• TODO: Hardcode path for passwd: here
• TODO: see if these lightdm config path work: here
• TODO: likely requires the locale plug: here

switchboard-plug-parental-controls

Status: Last try is #140430.

• parentcontrol not working elementary/switchboard-plug-parental-controls#55