What if I assign every user group to a Super User?

Question

This idea came to me when I was trying to formulate a question on this site found here.

Ok, bear with me, before you scream at me not to make every single user a super user, let me explain. This is in need of disambiguation.

What could be the disadvantages and detrimental effects of setting 2?

This is the setting now, setting 1, very regular, nothing special:

Name   Username  Enabled  Activated  User Groups
----   ----      ----     ----       ----
one    one       yes      yes        Administrator
two    two       yes      yes        custom1
three  three     yes      yes        custom2
derp   derp      yes      yes        Super Users

What if I changed it to this, setting 2?:

Name   Username  Enabled  Activated  User Groups
----   ----      ----     ----       ----
one    one       yes      yes        Administrator
two    two       yes      yes        custom1
three  three     yes      yes        custom2
derp   derp      yes      yes        Super Users, Administrator, custom1, custom2

To be very clear, this, setting 3, would be suicide and I don't mean to do this. I am aware that's not any better than doing something like sudo rm / -rf on a linux machine (for the record, don't do this!).

Name   Username  Enabled  Activated  User Groups
----   ----      ----     ----       ----
one    one       yes      yes        Administrator, Super Users
two    two       yes      yes        custom1, Super Users
three  three     yes      yes        custom2, Super Users
derp   derp      yes      yes        Super Users

Setting 2 would be a solution to my predicament in my recent other question (same link as above).

Answer 1

In fact, Setting 2 would only make sense to me if you..

...Have no inheritance of permissions to the top

...Only one usergroup has access to a specific task

Then it makes sense, if the superuser should simply have all tasks / views / options of the custom 1/2 groups this can be solved by inheritance in a cleaner way.

Edit: indeed superuser has no inherited permissions my idea was to create a custom „superuser“ aka build a structure with groups and privileges inherited as you need it.

I think you already know this page but for other readers, here the ACL structure is explained:

https://docs.joomla.org/J3.x:Access_Control_List_Tutorial