Chains that transition from POW to POS risk new competitors. As transitions occur specific foundations lose credibility in particular reward sectors. The competition calls “killers” by marketeers is self actualization that creating barriers between fee and immutability changes dominance speculation into new tiers of competition. Result specific POW protocols gain immediate acceptance as competitor flee to capitalist market structures.  This directly impacts miner profiles inflection points. POW capabilities depend on stake before reward. Whereas POS are more reward aligned with stake. Matters are further complicated if state is new energy supply or previous collected energy supplied though fait. 

My thoughts of the day open to interpretation and feedback.