[tracker1]

Similarly for sanitization, if you want to really reduce the subset of allowed tags, and to normalize input it's a pretty good intermediate format. Did this for a classified ads site, that included listings from external companies... it was easy enough to shift H1-H3 to H4-H6, keep basic formatting elements and eliminate the rest.

Markdown in the database is also easier to look at, reason with and takes up a lot less space. Especially if the content was pasted from say MS-Word to a Content-Editable field... omg the level of chaos there.