The repo is many years old, and I no longer write mobile games. So I'm not a good match as an author for such a book. Still, if I'd say yes, they would've published a shitty book. And I can't say I didn't think about it, vanity..
But if by "traditional publishing" you include electronic publishing, then I'd agree, something is probably going to change soon. It's clear that you can get much more education in today's world in ways other than books.
Truth be told, we go to early access largely because we think it helps us make sure the book is delivering the goods, collect feedback, and hopefully improve the book as a result. We try to make it very clear how much of the book has been written - indicating what chapters have been written, and make it very clear that the book is unfinished.
Packt and Appress ebooks are not even properly formatted for a programming subject (text alignment, code highlighting ...). Compare any Packt/Appress ebook with Pragmatic or LeanPub ebook formatting, the difference is staggering.
companies like Apress
Your 1-paragraph HN comment has more verifiable (relevant) facts than the entire article linked. The article doesn't need to be expanded, a different one needs to be written by someone willing to be more specific.