Change record status: 
Project: 
Introduced in branch: 
2.0.x
Introduced in version: 
2.0.0
Description: 

Advanced outsider permissions have been removed in favor of group roles with the scope outsider. The benefit is that you can now configure both an insider and outsider group role for a given Drupal role so that you do not lose your permissions when you join a group.

See the CR here for more details: https://www.drupal.org/node/3268110

Impacts: 
Site builders, administrators, editors
Module developers
Site templates, recipes and distribution developers