I sometimes think I've worn my foot down to a nubbin what with all the times I had to kick my posterior for overlooking something that seems blatantly obvious in retrospect.
I keep reminding readers to alert me to any errors, encouraging feedback. They're pretty reliable about catching many outstanding typos and other errors my editors miss, yet there are still numerous typos discovered in stories written, edited and vetted to the public years ago.
Some things just never change. The difference is, with us, we can change the errors whenever we spot them. For the traditionally published, once a book goes to print, your only chance to correct is in later reprints 5, 10 or 20 years later.
Then again, it's probably nice washing you hands of the entire thing. I know each of us (here on SOL) have differing criteria for when we finally cease frittering with a story, maybe correcting typos, but otherwise not examining older stories for fear they'll suck you in again. Knowing it's out of your hands must be a sweet release.