And any author could handle their own print on demand with a little bit of curiosity and self-learning. Aside from marketing efforts and audience, there's nothing else a publisher offers if they release a book *only* as print on demand.
Amazing that OUP seems to have put a new book straight into print on demand. POD is the only economical way to keep older backlist titles in print once they have stopped selling in large numbers but to do this with a new book is mad, basically not publishing it properly at all