Michael Soluyanov writes:
This is an add-on for Blender 2.8. It creates grouping-like workflow using regular instances.
- Ctrl+G - make "group" from selected objects
- F9 (adjust last operation) to set center of the "group" and set a name
- Tab - Opens "group" edit mode and return to scene.
This add-on uses regular Blender instances, so you can work with "groups" made by this add-on, even if you haven't this add-on.