Agreed, the article author is just gatekeeping as far as I'm concerned.

Most books available on PoD wouldn't be available at all without it. Not just less well known reissues but also new interesting books with limited readership, and books which larger publishers would ignore because of their own prejudices.

There are more luxury editions of classics than ever so quality-sensitive book collectors are still being catered for. And it's easier than ever to find secondhand copies of old books.