The only public safety users, that I'm aware of, on the analog TRS would be Pittsfield PD. The should be making the move over to MPSCS shortly.
There will still be users on the analog system, mostly local government activities. (Things like buses, street departments, road commission, etc.) The public safety radios still have the analog system programmed in, as a fallback, in case of failure of the MPSCS.