OpenSky in the 2009 era, they had some pilot sites in the Erie County area, but wisely decided to terminate the contract for failing to live up to expectation. One of the few smart things the state has done in recent memory. After they came to their senses realizing that an 800 MHz system using proprietary technology would be a lousy fit in a state with such varied terrain (refer to Pennsylvania's money pit former OpenSky system), they decided instead to focus on supporting P25 system buildouts at the county level, and to promote interoperability that way. Obviously the results are very mixed. Some systems/regions have decent interop between counties, other areas are a mess and are probably worse than when everyone was simply on VHF analog. Nature of the beast.
By the way, the NYSP getting dispatched by the counties is a more recent thing, as they've looked to offload the dispatching responsibilities over the past decade. Prior to that it was more common for them to self-dispatch, either from the local barracks if they were busy enough, or from the Troop/Zone HQ. Another thing that is a mixed bag, as in some areas you have the NYSP operating almost exclusively on county trunked systems dispatched by the county PSAP, in other areas they are still on their own VHF channels and are self-dispatched, and in other areas you have a hybrid of the two where they are self-dispatched on their own talkgroup on a county system.
Troop F, for example, where Zone 2 patrols in Orange County are dispatched by SP Middletown on the Orange County 700/800 system. Zone 2 patrols in Rockland County are dispatched by Rockland 911 on the Rockland County 700 system. Zone 1 and 3 patrols in the counties north of Orange are dispatched by the NYSP on the legacy VHF channels.