Problem/Motivation
I'm opening this because it confuses me, I don't yet have evidence that it confuses anyone else.
admin/content has a list of node content, then tabs with lists of comments and files (in the 8.x standard profile).
admin/people has a list of user accounts, then tabs with roles and permissions.
There is admin/config/content - although the title is 'Content authoring' and the main sub-item is for text formats.
There is admin/config/people - by default the only sub-item is 'Account settings'.
Most of the 'settings' for content are under admin/structure, like 'Content types'.
I can never, ever remember where roles and permissions are when I need to find them, get it wrong every time.
Proposed resolution
Move roles and permissions to admin/structure, since they're primarily site-building tasks that are changed infrequently.