Conversation so far:
What was the industry impact?
NBC became the first large United States network to broadcast the same show every weekday during prime time since ABC's Who Wants to Be a Millionaire.
When did that begin?
in 1999.
Was the show well received?
" An industry observer said that Leno, "in all my years, is the biggest risk a network has ever taken..
What made it a risk?
According to former NBC president Fred Silverman, "If the Leno Show works, it will be the most significant thing to happen in broadcast television in the last decade..
Did Leno replace another talk show?
CANNOTANSWER.
What else did you find interesting?
The January 29, 2010 issue of Entertainment Weekly listed the show at the top of a list of the 50 Biggest Bombs in television history.

Question: Why?
Self-contained rewrite: Why did Entertainment Weekly list The Jay Leno show at the top of a list of the 50 Biggest Bombs in television history.?