Yep, I certainly don't mean to imply my code is right. But it's usually shorter, and it's mine. So when I find the bug, I can make the sane fix on the schedule

Yep, I certainly don't mean to imply my code is right. But it's usually shorter, and it's mine. So when I find the bug, I can make the sane fix on the schedule I need. For particularly good OSS libraries, I guess providing a PR would only be a little slower than fixing internal code. But for anything poorly maintained, or with closed development, discovering those bugs often means writing an enormous workaround or switching libraries entirely - they just won't be fixed any time soon.