How about when a show changes hosts. For Example when Jon Stewart Left the Daily Show and Trevor Noah took over the host seat because "The Daily Show" had to attract younger audiences to the show. Or the Late Show where David Letterman left and Stephen Colbert took over on similar grounds. For Long time audiences that would be considered an outrage to them. but to Younger Audiences something to consider.
None of them changed because they had to attract a younger audience. They changed because the hosts moved on of their own accord. When presented with such an opportunity, a smart decision is to consider the demographic landscape and factor that into the equation. It's no different than the Tonight Show changing hands multiple times.