> From a technical and practical point of view this stuff isn't actually hard: you start with the big airlines. You still need to get any new integration certi

> From a technical and practical point of view this stuff isn't actually hard: you start with the big airlines. You still need to get any new integration certified, and not just on the plane side, but also on the ground. And it's ... problematic because you would then have two wildly different systems in parallel, and pilots would need to switch between radio and digital all the time. Too much potential for chaos.