On the Fear of New Technologies
It appears that the fear of new technologies is a major criterion for not adopting them. This fear is often a product of ignorance of the new technology. Another factor for not adopting new technologies relate to 'peers'. That is, companies want to be as fashion as their peers, but do not want to dare too much. It is usually a miscalculation of risk, as they seldom take the time to assess the new technology.
I conclude that the introduction of new technologies is often related to a culture of innovation within the company. And that is a rare culture, despite the rosy discourses.