#Group

Bulk operations for group users/roles/owner.

Select groups to modify, and get this form to make changes.

ECA/VBO actions for group.

The VBO action is very clunky to use in practice. You need to know the group ID to assign it to.

Maybe a VBO action can be created in ECA?

Add a field to content entities to select the group to add them to.

Create groups with private content.

There are lots of additional modules with extra features.

The UI can be hard to work with. Modules or custom code are needed to streamline it.