This is something that I thought and have been wondering about for quite some time now. If the original writers of a show must move on to writing for other, new shows and be replaced, they why can't the replacement writers who are just as good as the last writers be hired, or why don't they get hired? Why settle on the not-so-great new writers? I mean, what does that all come down to? Affordability, availability or what? Rather than just get any writer who could only hinder a show in lieu of helping it.