I’ve had this idea as well, and I definitely see some benefits though as stated in the thread by someone else, most admins would want to be on a groups instance and not a users instance and I’m not sure how to combat that. The thought that occurred to me was a lemmy federation compatible community only instance server that could augment the current thrediverse landscape. Essentially making it easier to spin up a community for your topic than it is to spin up a while new instance. It would still be easiest to just make a community on your main user instance but it would introduce a new difficulty level for communities to run separate without standing up a whole Lemmy instance.