In the case of a Piwik instance having multiple super admins, it is hard to share or transfer work. Both super admins have there own set of settings, like email reports they have created for users, segments that have been created, not shared with everyone.
One super admin is not able to access (or view) these parts created by another super admin, so they start creating extra reports, and segments.
This is particularly an issue in enterprise environments.
It would be more than nice for super admins to be able to see and change other people's settings, reports and segments.