I always thought WB lost their sense of humor as the original crew went elsewhere or died. Their original cartoon artists, voices, composers and, most of all, story writers, were top notch in every way and generated more laughs per reel than the competition for many years. Too bad it didn’t last.
Nothing can top Tex Avery cartoons, though in terms of laughs per reel.
One of the best things about the old cartoons was the music and how it matched perfectly the action, especially Tom and Jerry cartoons.