Here’s what I hope to be true: Writing a book doesn’t have to kill you. Launching a book doesn’t have to kill you. A “book” can be short. It doesn’t have to be a free blog post for the sole purpose of harvesting eyeballs.
Writing a book seems to have the same pain-distance effect as something like childbirth (though I haven't personally experienced the latter). Right after book launch it is "never again" then over time that changes to "maybe one more" ;)
Never again traditionally published though. That whole experience is no longer worth it.