It tells all about $5 LOL and I don't believe if that was really a FAQ, I found it when try to find the usefulness of DOS in modern day. Well, sometimes you just can say "it works for me!" and skip the whole evolution.
In many case DOS still much well reserved than the newly revived eComStation (OS/2) like BIOS updating, low level format tool, emergency tool (in LiveCD form) and tons of artistic pixelated games. Hmm I might can skip until Windows 7's EOL... XP for another decade?