Mastering technology surely expands the possibilities before one, they are helpfull in todays world, but they should be in control. A Cyberpunk uses technology, as far as it is the only powerfull source in material, that controls it. As long as people are moving more and more to the cyberspace, it can be fully used, to master the art of surviving in the world. Cyberpunk is way of thinging, way of surrounding the boundaries, as a cyberpunk doesn't respect them. Boundaries are trying to limit us.
Cyberpunk is psychology of technology.
Before electronics, people used whatever they could for the same thing, we use technology, nowadays. Technology is just a part of the surrounding, a tool. A cyberpunk should not be placed just and only in the hi-tech environment, when imagined. A cyberpunk is more the person inside. The one, who mastered technology to help him, make through.