Stormfather43

Could it be the planet Ashyn? In Arcanum Unbounded, Ashyn is described as "the burning planet, which suffered a cataclysm long ago. People here live in very small pockets of survivability, including the famous floating cities." This certainly seems to fit with the descriptions of the planet in The Sunlit Man. I know there are other unknown issues at play, like how the Threnodites would have arrived. But that just seems such a close description. Thoughts?