Currently super admins can revoke privileges of other super admins and there is no way to track this activity, either on the front end or the back end.
From a user control / Compliance perspective, this is sub optimal. Super admin activity needs to be monitored and audit-able. Please enable all super admin activity (esp activity surrounding management of other users’ permissions) to be tracked.
Yes. We have several super admins. There are so many moving parts in HubSpot, that something can be changed and go unnoticed for a while, then when we finally realize what happened, we left wondering, “Who thought we needed to add this permission set” or “Who changed the User Defaults” etc.
So many things can be modified, and finding who did it is the first step in figuring out why it happened.
HubSpot now has a Centralized Audit Log of User Actions 
Enterprise tier Super Admins can view a centralized audit log of their users’ actions such as:
who deleted X record?
who changed Y asset?
Starter and Professional tier customers can view a centralized log of all security and login activity taken by users.
CTA
Any feedback, such as any actions not yet covered in the Audit Log, please tell us using the purple feedback button at the bottom right when viewing the Audit Log (linked above) - it comes directly to our team building out this feature