That's not an inherent limitation of PoS; PoS systems can be either AP or CP. Most PoS designs go with CP, but NXT and Ouroboros are examples of AP PoS systems.

That's not an inherent limitation of PoS; PoS systems can be either AP or CP. Most PoS designs go with CP, but NXT and Ouroboros are examples of AP PoS systems. They use Nakamoto consensus, much like Bitcoin. It's true that Ethereum 2.0 will require 2/3 availability in order to finalize transactions, but that's true of any BFT system; see [1] for a proof. [1] https://zoo.cs.yale.edu/classes/cs426/2017/bib/bracha85asynchronous.pdf https://zoo.cs.yale.edu/classes/cs426/2017/bib/bracha85async...