Gustaf (not V) Westerlund mentions that while it may be attractive to create a team with System Administrator role to simplify security administration, the “inherited” approach is not sufficient to grant users all privileges that they need as System Administrator. For example, users cannot publish Business Rules if they don’t have a user role that grants them this privilege.
To better understand the limitations of CRM team security, read this classic from Adam “it’s not really inheritance” Vero.