It could have been three hundred, three hundred thousand or three hundred million years and it wouldn't matter since it was just an excuse to get the Autobots and Decepticons out of the picture. Doubly so since there's time travel involved anyway.
The writers could have written it as the Autobots getting bought out by the Dinosaucers after ill-advised real estate investments and the Decepticons disbanding because of Megatron's new girlfriend insisting on performative evil schemes and Beast Wars would play out the same.
The writers could have written it as the Autobots getting bought out by the Dinosaucers after ill-advised real estate investments and the Decepticons disbanding because of Megatron's new girlfriend insisting on performative evil schemes and Beast Wars would play out the same.