Boy you guys are real retro grouches! First of all, I have had MANY ebrake problems over the years from cables frozen with corrosion to snapped cables to worn out mini brake pads. None of these failures would have been any different with an electronic actuator.
Second of all, I used to hear this argument against power windows and door locks. In thirty plus years of driving I have NEVER had a problem with my windows or door locks that was power related.
Any feature on a car can fail, electronic or mechanical. The question to ask is whether the new features have been properly designed. Then you have to ask if the components used have an adequate design life. If the car maker has done a great job then you can embrace the new technology.
As far as worrying about computer crashes while driving? I fly in commercial airliners often. They are HUGELY computer controlled. I don’t recall the pilots ever having to reboot the computer in flight.
Reality check - Most failures these days are mechanical in nature. Many electronic failures are sensor failures that are due to wear and tear (emissions) or physical damage due to location (wheel and transmission sensors).