For whatever reason I've preferred, at least so far, Fable to 5.6. I've spent the time since Fable's return being very cautious about when and how I use it, whereas with 5.6 (especially given OpenAI's generous limit resets) I'm pretty liberal about using it for lots of things that in the long run I could do with a less capable model.
Psychologically, I think that approach has made me value the delicate, ephemeral creature that is Fable more than I otherwise might. I don't know if that was Anthropic's plan, but if it was it worked on me at least.
But there's a limit to how many times they can play this card. Eventually either Fable has to blow me away so much that it justifies the API spend (it hasn't yet), or I have to decide that I can't rely on it, and I develop an approach that leans on it less heavily.
I don't know when we hit the tipping point from scarcity increasing perceived value to uncertainty reducing real value, but it can't be that far away.