You asked for data, I brought you the most relevant thing possible yet you keep going to "Elixir Forum". I don't think you want to hear about data, you want to hear about findings that reenforce your opinion.
I am not refuting the data, I am refuting the flawed conclusions you are drawing from it. You are taking the decline in usage of one service as an overall indicator of the community. I provided a possible explanation. I mentioned the GitHub ranks as counter evidence. But way to go on the ad-hominem.
I do worry about the impact it has on these "popularity tracking" services though, since the discussion living elsewhere might (falsely?) indicate that the language isn't attracting developers.