That's the only time I ever came across it, and it was always frustrating to switch between markdown and textile depending on which application/site I was using

That's the only time I ever came across it, and it was always frustrating to switch between markdown and textile depending on which application/site I was using. I don't love markdown, but I am pleased that it "won" in the sense that I can use it everywhere. There's nothing worse than having to use three+ different markup languages during the course of a day.