The whole is greater than the sum of its parts.
In SAFe, Agile Teams are not stand-alone units. Instead, they are an integral part of the Agile Release Train (ART), where they collectively have responsibility for delivering larger value. Teams operate in the context of the train, adhering to its vision, collaborating with other teams, and participating in key ART ceremonies. The teams and the train are inseparable; the whole is greater than the sum of its parts. During the transition to Agile, it is typically the case that additional infrastructure work is required to be able to integrate assets frequently (hourly, ...