My take is this is the end of an era - the long-time morning show era. Kevin and Bean, Mark and Brian, Howard, Mark and Kim,et al. They all rode the good times when there was a school of thought that, like an NFL team without a star quarterback, a station was sunk without a great morning show; and once a winning formula was obtained at a given station, management was convinced it could not be replicated and paid these personalities enormous amounts of money to stay. But that was also in the day of sky-high station asset valuations and beyond-crazy leveraged buy-outs by large conglomerates. All of those days are gone. I believe stations will no longer allow their talent to become bigger than the station itself - there will be a limit as to how much talent, even talent that can be shown to increase marginal ratings, will be paid and it will be well short of what the personalities on my list made. The overall lowered station valuations and related cash flows simply will not support those old high salaries.
Thus there will be no need for morning shows that last three decades, and most likely top talent, once it hits its top earning potential, will start to capitalize on their personalities in other more profitable venues, and thus will lead to more frequent turnover at a given station.