Hydroboost braking systems

True the brakes power assist will go out after you apply it a few times but like you said so does a vacuum system. also your not trying to stop a 3+ ton truck, its a car. the main thing too is if your motor dies..... you stop. only a monkey going downhill is gonna try to keep going with a stalled out motor.

The fact is with a huge cammed motor with no useable vacuum you have a couple choices. one being run manual brakes but a lot of people want the easier pedal. another is the electric vacuum pump but most are not reliable enough for constant use. pretty much last is the hydoboost. more costly yes but you get better braking.