Yes, I agree that DPoS, TPoS , PoS all have unique security benefits that PoW lacks as well.
PoW has some security aspects that PoS lacks too. Unfortunately(from a perspective of curiosity), since Bitcoin has such a large lead and a much better network effect we are unlikely to see an fair battle between the two as history has shown that technologies must have a significant competitive
advantage to be able topple the established incumbent with such a sizable lead.

I.E.. dvorak keyboard is superior to qwerty but not significant enough to change peoples behaviors.

I am not suggesting PoS is slightly superior either but merely the fact that any alt has to be shown to be significantly superior to Bitcoin in order to catchup.