The list you named is a bit strange, I wouldn't put something like docker anywhere near the others, their innovation isn't really on the technical side. If I h

The list you named is a bit strange, I wouldn't put something like docker anywhere near the others, their innovation isn't really on the technical side. If I had to take a guess, a lot of these places are close to hardware. Working with hardware has the additional bonus of often mandating high performance. Any task becomes a lot more exciting when you have microsecond deadlines for controlling an industrial laser.