I never understood before why people would go through so many drafts

I've heard so many writers be like, "I'll go through seven drafts of this book before I send it out," and I've always been like, "Why? What are you doing? What changes?"

But with this book I finally understand. Because although I don't exactly work in drafts (I just keep working from the same Scrivener document), I'm now doing my fourth major revision of…