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I don’t expect it to as long as the mark-up is valid. Perhaps someone with more SEO knowledge will stop by to correct me.

• martin_a 4y ago
  You're right. HTML5 does not work with DTDs anymore, so unclosed tags are not a violation of the document schema and therefore probably not "punishable" by search engines.
  • anjbe 4y ago
    Implicit end tags as described in the article have been allowed by every HTML DTD not named XHTML.