This means that the system will take more than a year after it's operating just to pay for itself. That means that in the short term anyway, the project will actually save the MBTA money exactly when it needs money the most.They'd lose $670m+ of the 770m+ they make in operating revenues, and probably not save much long term in terms of paying employees by abolishing fares.
AFC 2.0 is about $700 million, though and will probably balloon following all these delays..
Plus, if we build AFC 2.0, we saddle the T with an expensive system that it has to maintain for 20 years. We don't have 20 years to double T ridership if we want to meet the city's carbon goals.
Why not work on removing fare machines when we're already removing the fare machines?