This is not to say that marketable work by the industry's standards can't also be brilliant. But the publishing industry is not a meritocracy. By its nature, art is individual. A decade ago, what the mass majority of readers could read at all was selected by a very small number of people. If their tastes didn't match up with the tastes of the reader... then three people lost out: publisher (who made no money), reader (who had to settle for something they didn't care for or not read at all)... and writer (who wasn't bought). It also means there's a "house style" throughout the entire industry, one so pervasive most of us don't even realize that we're all writing books with similar structures because those are the books that sell to generations of readers who have been taught this is what "good books" look like.But good stories come in more forms than the ones we're entrained to accept as "well-written." Every currently acceptable style was once avante garde. The novel itself is only a few centuries old. A lot of the artificial distinctions created by a paper society no longer need apply: novellas aren't "bad" art because they've been considered unsellable by our existing business model. Books don't have to be written in trilogies or issued in chunks. "It's the way we've always done it" is not a valid argument unless the alternatives are unworkable... and I should know. I'm a pretty old-fashioned sort and I get that argument all the time.