Why is bbcode still around?

From: Rod-Lists 
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Why not do forums in html or xhtml?

=============================================================== From: Sean Brewer ------------------------------------------------------ Because non-careful sanitation of HTML will result in XSS issues and other nastiness. That is a bad thing. You're just flat out better off not accepting HTML at all. Hence bbcode, markdown, etc.

=============================================================== From: William Wade ------------------------------------------------------ This is the new open source forum setup from the founder of StackOverflow. Looks really nice: http://www.discourse.org/ I suspect that part of why bbcode is still around is because this was only just released.