I think that you're conflating correlation with causation. I think it's more plausible to assume it was the early numbers that are skewed and non-representative

I think that you're conflating correlation with causation. I think it's more plausible to assume it was the early numbers that are skewed and non-representative. The fact that GitHub itself was is a killer app of the Ruby on Rails, and that the Rails project itself changed to being hosted on GitHub somewhat very early on it's history [1] had a disproportionate effect on the early community that gathered there. Now GitHub attracts a much more diverse portfolio of projects, so the numbers you see there are less statistically biased towards early Ruby on Rails adopters. [1] Commit history on the main branch of rails/rails via github goes as far as Apr 10, 2008 https://github.com/rails/rails/commit/c67e985994362290308073ed2793dd8e7f2a76db https://github.com/rails/rails/commit/c67e985994362290308073...