Volunteers can create teams as needed, but teams lack many reporting options for admins. On the other hand, User Groups have more reporting and filtering options, but must be creating manually (time-consuming) or by requesting volunteers add themselves to a group via an email with User Group link (which they may or may not do).

So we are left with manually adding every Team member to a User Group. It would be wonderful to instead have an action available from the Teams admin page to add ALL members of a Team to a User Group OR to allow filtering for teams in a User filter, so that we could use the existing Add User Group bulk option.