Considering the pump has done around 500 million pumping cycles at 200k miles (one per crank rotation), I'd consider it a pretty darn reliable piece of equipment.

No wiring, no noise, no vibration, no maintenance, autonomous operation and its mounted out of the way on the engine instead of taking up engine bay space.

If I were going to eliminate the stock vacuum pump, I'd eliminate vacuum entirely. Hydroboost brakes, electric door locks and solenoid ACC actuators. The transmission modulator would be the biggest issue, though a manual transmission will solve that.