The simplest answer for me is that I know Python very well, but don't know Javascript (that was more true when I just got started with web programming a few mon

The simplest answer for me is that I know Python very well, but don't know Javascript (that was more true when I just got started with web programming a few months ago). If I could use Python in the browser, I would: one less thing to learn. Especially since my (server-side) application is written in Python/Django, it makes even more sense. I also consider Python a great language, and am usually happier in it than any other language. It's nicer than Javascript is, at least in my (limited) experience.