I have been working on my roguelike for about twenty years. I've never come close to even playing a quarter of the way through it. It's never been anywhere near done.
You kid, but I recently turned 40. After my birthday, I thought it would be useful to come up with a list of goals to reach by 50. Getting my roguelike to 1.0 is high on that list.
(I’ve been working on an unreleased unusable IDE for a little over ten years, but the end is in sight for me!)