What I have to say about typos in books

In my youth, like when I was a new teenager, I would find typos in books and think, 'Oh my god, they left a typo in here. How could that happen?' The outrage, the indignation!

Okay, so flash forward twenty-mumble years, and I'm a writer and an editor. I still get really distressed about typos and so forth. But then I go through the process of preparing a book for publication. Not just developmental editing but copy editing and proofreading, book layout, managing writers and artists, overseeing...