Big data is a con.
That's all you need to remember when someone uses the words 'big data' in preference to the research findings under discussion.
Unfortunately we are living through strange times when those who make important decisions know very little about computers and what they are capable of. If they even kept this thought in mind they would be better off. But organisations reward the appearance of competence over actual competence so the problem persists.
Eventually, in a century or so, people will be as wise about computer 'experts' as they are about plumbers.
So, not an entirely trouble free vista ahead.