Having read it in high school English class, I once asked my old teacher what he thought of the movie adaptations of The Great Gatsby (I'd disliked the Redford version, and avoided the 2013 one; he believed no one had ever done a proper adaptation, and predicted "a disaster" with Luhrmann's attempt), and this led to him making what I thought to be a very cogent remark about adaptations in general: "Novels that are pure plot can transfer to film well (Robert Ludlum comes to mind), but anything literary will lose a lot."
I think that's been shown again in the case of The Expanse; reading the books, I found myself engrossed by (to me) rapid-fire plot developments and twists, mixed with highly descriptive settings, actions and backstory--all of which I encountered again in the TV/streaming version, with well-done casting and language added. Not every element or character can be included, as pointed out in these articles, or they get altered for time or plot arc reasons, and this series was no exception. Nonetheless, for once I found an adaptation that didn't butcher the source material, or go so far from it, even when just used for inspiration/loose adaptation, that it becomes unrecognizable (looking at you, all versions of V); only on blue-moon occasions (such as Jurassic Park, IMO), have there been ones which improve on it.