probably

I'm looking for a reference like ones which exist for indicating programming language "popularity." Of course they're all biased, etc., but was curious for one or several ballpark estimates.

...is it cliche to ask them what language they program in? Is there a better topic of conversation?

I've come across fuzzy logic mostly in pedagogical context these days. Of course there are still researchers and developers using fuzzy logic to develop algorithms, but has the mainstream future of AI been supplanted by machine learning, natural language processing, computer vision, robotics, etc.? Or fuzzy logic has become a part of each or some of these subdisciplines of AI?