Well if one goes back to 1955 relability was sometimes measured in terms of a few hours of operation(tubes) Now the best systems can get 40,000+ hours under temperature and vibration(Aircraft/Oilfield environment) -- In the 1970's I recall living with the frequent tube replacements on the TV which cost as much as a used car(tubes)
Now for high reliability one faces the challenge of reliability under thermal cycling.
Partly a device issue and partly a packaging issue (newer processes and lower cost devices and packages)
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.