It would take away their affiliation but I doubt they're in jeopardy considering they were recently bought by the owners of the Orlando Magic.
My list of what I consider stable teams (without a defining characteristic to base it on)
KC (owned by Lamar Hunt), Rapid City, Witchita, Fort Wayne, Allen, Idaho, Utah, Cincinnati, Orlando, Florida, Toledo, Tulsa, Jacksonville, South Carolina, not sure about Atlanta but I'll put them on my list, I'll say Portland considering their ownership but that may be premature.
I hope Norfolk and Manchester can find a way to revive their attendance figures, maybe in the case of Norfolk that could be helped with better owners.