I like functional programming because I like algebra. When I can reason about things in a way that I understand, that makes me happier as a programmer. I don'

I like functional programming because I like algebra. When I can reason about things in a way that I understand, that makes me happier as a programmer. I don't think it needs be any more complicated than that. If it's not popular, so be it. Most of what I am interested in is not popular. I don't care.