This is starting to look at a lot like Intel vs Arm from the last era.
The Fable & Mythos are starting to look like a giant Xeon, while the smaller lighter models are starting to look like a lot of tiny ARM chips which sip on power instead.
The risk is the same as what Intel had. There is a group who are pushing them to go bigger and with a resource no limit approach, who have a lot of dollars to push you that way.
Follow them and they lead you to a pile of money, but then you risk something like Apple Silicon happening.
Something which got better because of efficiency & continuous improvement, not neutered due to it.