Audiobooks punish shortcuts. If the pacing is wrong, the listener feels it. If the character choices are thin, the listener feels it. If the narrator starts performing at the prose instead of through it, the listener definitely feels it.
CJ Emerson brings long-form narration discipline, vocal endurance, and a strong sense of character restraint. That makes him a fit for nonfiction, dramatic fiction, and story-led material that needs trust more than theatrical excess.