You never know what trade-offs are involved -- with the Leonardo, which is almost identical to the Uno, they basically added 2 extra pins -- in the case of the Mega and Due, then had a lot of difital pins ~50 and fewer analog pins ~16 -- so them moved the I2C from the analog pins across the board to some of the new digital pins.
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.