I’ve also been using Ruby full time for 13 or 14 years and I am really hoping its popularity and commercial viability continues for another 13 years (or another 25).

I’m certain my level of mastery contributes to my enjoyment. And it’s not that I don’t like learning new things, I do! But Ruby is just an absolute pleasure to write, and it’s hard to imagine spending 8+ hours a day living in any other ecosystem.