I'm always learning. When I come back to some code I've written before, I'm never happy with it because its missing an idiom that I learned in the meantime that

I'm always learning. When I come back to some code I've written before, I'm never happy with it because its missing an idiom that I learned in the meantime that would make it simpler. Or, I didn't completely understand the problem, and some of the assumptions I made at the time turned out to be wrong. Or, it's more complicated than it needs to be. Or, its too simple, and I need to add more functionality. Code is never finished, it's just released. Then modified, and released again. Then abandoned.