To be honest it looks more of fanboyish survey. What we do in industry and what is in the survey results is lot different. Nobody uses Rust for their blog, web app and desktop apps. So these are just developer wishes in the surveys.
That's also literally the title of the plot, "most loved"... There is a separate graph for what is most used, which is JS, Python and Java (Rust is near the bottom).
Doesn't seem fair to call it fanboyish just because reality has a gap between what is used and what people would like to use.
What else we are supposed to call it? People push rust, go and dart without seeing the industry demand and often misguide newbies on their careers. I don't see any other right word for this in such context.
Sky It's just called having a preferred language? There's no blind obsession or over-excitement or pushing, it's just what people would like to use if they could. That's not what "fanboy" means.
You bring up industry demand again, but I don't understand the connection. Why is it bad that "most loved" does not match "most used"? Yes, there is a disconnect between what developers would like to use, and what they get to use. Both are reported.
I think there is blind obsession, that's why people push titles such as "ruby will overtake python, rust will replace node, php will die in 2020". When such surveys lead to such world view it sure sounds like fanboyish edgy perspective.