I do think the way they do news (a mix of local news, national news, weather, celebrity news, police pursuits, and fun banter) just works for the all day news format. It also helps that their news is properly funded. This isn't some broke Sinclair station producing 16 hours of news a day, they have the staff and resources to cover LA news properly. Yeah if you watch it all day long non stop it could get boring but you could say the same thing watching hours and hours of court shows or talk shows all day. They cover serious news when needed yet allow talent to have fun in a way that is unparalleled to any other station. Their talent is so beloved by viewers that they can basically do a whole hour of them having an unscripted conversation (Off The Clock) and it works. It's also worth pointing out that 15 years ago they only had a morning newscast and hour at 10:00pm. Daytime used to be full of Jerry Springer, Maury, Steve Wilkos, and other conflict talkers. Repeats of Family Guy aired in the evening. They slowly built up over the years starting with news at times when other stations had entertainment programming and then expanding to compete against the other newscasts head on.