Why do Atlassian org admins have an internal group called 'org-admins' mapped, but not site admins?

[Colruyt Group]

Is there any specific reason for not having an internal group to maintain the site admins, like there is for org admins?

[John Funk]

Hi Colruyt,

There used to be a separate group for site admins. Not sure why they changed it to just grant a permission instead. But that’s what it is now.