In an interview with John Self, David Mitchell explains how he approached the unfamiliar territory of the third-person voice while writing The Thousand Autumns of Jacob de Zoet:

I’d never really attempted this commonest of forms before because I never knew what to leave out — the third is the infinite voice, whereas the first is the limited one — [but] a few years ago I asked A.S. Byatt how she decided what to put into third person narratives, and her answer was as simple as it was helpful: what you think the reader will want to hear, that’s what you put in.

That is possibly the worst fiction-writing advice I have ever heard, and I’m not surprised it came from Byatt because it cuts to the heart of what makes her work so radically unsophisticated. It’s a recipe for pure storytelling with an overbearing emphasis on the telling-ness of the story; it’s an excuse for using the form of the novel to spell out a fictional tale without exploiting of any of the particular aesthetic and rhetorical properties of the novel in order to artfully shape the tale in the telling. It’s not a blueprint for a way of writing a novel that works as a novel; it’s a way of throwing the garb of a novel over an impromptu but strung-out campfire yarn.