Quentin Tarantino famously said he was only going to make 10 movies. If he will stick to his words or not that remains to be seen, but the idea of having a hard cap to a creative output is something I appreciate more and more. I deeply respect people who have the courage to quit when they feel they have done what they wanted to do, expressed what they wanted to express, created what they wanted to create.
In today's world, and especially in today's creators economy, quitting is rare. When people find something that "works" they usually keep producing content ad nauseam. And then periodically we have this wave of creators feeling burn out (and they usually announce this by creating more content, go figure).
Leaving behind something that worked in order to pursue something new takes courage. We should celebrate more people who do it. It's not even quitting. It's called being done with something. And that's a good thing.