People keep brining up Camden, but in that instance, didn't the State Troopers still maintain control of the area during the transition?
From a political perspective, "disbanding" will most likely mean just making existing cops re-apply for their current roles (like how TVA did mass layoffs and rehires in the 90s).
I'm still convinced actual disbanding, without a security force in the interim, will be straight up disastrous.
I don't know what state troopers in Minnesota or Washington are like, but having them step in during the transition while those cities rebuild healthier police forces, sounds like a reasonable idea.
Though I'm not convinced it will actually be disastrous to do without police, or with dramatically reduced police, for a short period.