It’s a marathon, not a sprint is a cliche, but it’s also true. You’re not sprinting to the finish line and then stopping. You’re getting to A release, not THE release. If you’re doing it right, there’s another one coming up, and many more after that.
No amount of talking about doing something will get it done. To get it done, you have to do the thing, whatever it is.
You can’t be done unless you know what done means. So how do you know?