All my jobs have been with food in one way or another since 1948. My parents were in the hotel business, and I just loved the warm hearted people who worked so hard with such good humor.
The planet will survive. Whether we get to be here and enjoy it, or enjoy life as we've known it, is what's questionable.
The most important application of quantum computing in the future is likely to be a computer simulation of quantum systems, because that's an application where we know for sure that quantum systems in general cannot be efficiently simulated on a classical computer.

