The proof is in the pudding.
This last week my wife was a superhero. She read the entire thing again, and found over 100 issues in the proof copy of my book. I sent the markup to my editor, and he found another 5!
I honestly have no idea how people self publish. I just hope that by the time I am editing the next book, AI has gotten good enough that SIRI can dictate for me and work out the grammar automagicaly.
The good news is, thanks to my wife's editing blitz (tip for all would be writers: marry an English teacher) the Dragon and the Crow looks like it will make it for Christmas.
Now I just have to hope the process of converting the book to ebook is easier than making the dead tree version.