Wow! Nostalgia. In the early days of WordPress, I was not fond of using its interface to write articles. Textile was simple, and I could quickly and easily write without touching the "Editing Buttons." I had Textile formats in the text for such a long time that I still find some remnants that missed the conversion to this day. Textile predated Markdown and, to me, felt much more evolved.
I don't think TextPattern as a CMS caught on!