Past a certain point you stop caring.
No matter how passionate and dedicated you are when you start, the fires have to die out eventually, right? You might be able to stoke them with gimmicks, or with inspiration, or with the usual method of most artists, that is to say, drugs.
But at some point, you just run out of things to say.
If you’re lucky and cynical, you can just keep churning out variations on the theme and keep the cash rolling in, but for the artists, it’s a challenge.
I really hope to never reach that point, myself.