230
And Quartz, of course
(imgs.xkcd.com)
Source: https://xkcd.com/2501/
Alt text: "How could anyone consider themselves a well-rounded adult without a basic understanding of silicate geochemistry? Silicates are everywhere! It's hard to throw a rock without throwing one!"
I see that as a win-win situation. Other people can spend the extra time on doing something else, while nobody gets to find any of the mistakes left in the text.
If you knew that everyone would read your texts, you would be super worried about any potential mistakes still left in the final edition. Since, nobody actually reads it, you don’t need to worry about anything.