This is why commercial airliners have multiple engines even though the
system is less reliable overall than a well designed single engine craft
the failure of a single component does not entail the catastrophic failure
of the entire system. (there are exceptions to this but the overall
concept does work).
Last year, a Boeing in flight over the middle of the pacific ocean had
its entire glass cockpit system go dark. After frantic conversation
with the air traffic controllers a decision was made to toggle the
circuit breakers for the TRIPLE-REDUNDANT computer system onboard, which
brought back the displays. Even with a 2+1 setup, things can still go
wrong...
