Ture but . . .
"Yes I know who Bruce Schneier is, and yes I agree with the general statement that nothing is unhackable given enough time.
However the basic sanity test of viability still very much puts WiFi / remote control of a Boeing 777 firmly into the Hollywood fiction category. I doubt Mr Schneier would disagree with me there."
mixture, what you say here is true however, a hacker doesn't have to take control of the aircraft to cause an incident.
They could just target specific components of the system (for example disable comms) and cause an accident without actually trying to fly the aircraft.