There’s something to be said for the use of plain text files. Text is simple. Text files are easy to read on any computer running any operating system and don’t require any proprietary word processor to interpret. Even more important, text files can be read by humans. Keeping your writings in text makes them digitally immortal.
Moreover, text is internet friendly. The files are small and can jump among connected devices with poor connections like hopped up Disney faeries. It is really easy to work with your text files on any device from anywhere.
Things like PlainText on my iPhone and Notational Velocity on the Mac have made me realize just how right Sparks is about this.