Perhaps a mention of Malcolm in the Middle would be part of a more complete history. But the author uses 2007 as the tipping-point between "yesteryear" and the modern sitcom; a show like Malcolm, which ended in 2006, would fall in place quite nicely in the author's argument and not prove an exception to the rule.
I haven't seen The Simpsons in about 15 years, so I won't comment on it—except to note that it debuted only a year after Roseanne, and the two overlapped for about eight years.
Overall though, I do agree with the article. It does seem like everyone has it really easy on American TV.