Software is only a part of it. I deal every day with software that doesn't randomly fail -- we write damn good code -- but the hardware it controls has failure modes that can't always be predicted, or are so unlikely that no one thought of it.
Realize here that we're not talking about software running on a server in a nice temperature controlled room. This is software controlling hardware that is under constant vibration, will get sticky, or bend, or break, or ice up under variable conditions - hot, dry, rainy, wind gusts as it goes from behind a building to crossing an intersection. There is a mind boggling number of things that can go wrong when you're controlling a device in the 'real world.'
Even if the software is perfect there is still a large number of variables to account for and most of them can't be controlled. There's a case for UAVs and I would love to get involved with them, but building a reliable UAV and properly maintaining it would almost certainly cost too much to have it deliver tacos. Unless you're willing to spend $250 to avoid walking a few blocks.
Realize here that we're not talking about software running on a server in a nice temperature controlled room. This is software controlling hardware that is under constant vibration, will get sticky, or bend, or break, or ice up under variable conditions - hot, dry, rainy, wind gusts as it goes from behind a building to crossing an intersection. There is a mind boggling number of things that can go wrong when you're controlling a device in the 'real world.'
Even if the software is perfect there is still a large number of variables to account for and most of them can't be controlled. There's a case for UAVs and I would love to get involved with them, but building a reliable UAV and properly maintaining it would almost certainly cost too much to have it deliver tacos. Unless you're willing to spend $250 to avoid walking a few blocks.