The projects mentioned in the article we are commenting on (or more accurately the chain they run on - Luna) are Proof of Stake. PoW is completely irrelevant here.
Yes, and it can't hold it's peg, that's why we are here. So apparently this is not a functioning project that is working (as in "can solve its proposed use-case")
You may be disinterested, but you're not informed. The people above you are not arguing about whether LUNA is a successful coin in general, but over how it reflects on "proof of stake" vs. "proof of work" protocols. If you think LUNA losing their peg is a good argument against PoS, you don't know enough about cryptocurrency to judge these arguments. LUNA's peg to the dollar is ensured with a scheme that has zero to do with either proof of stake or proof of work. Saying Luna's failure redounds on proof of stake protocols is like saying that AOL's failure redounds on the HTTP protocol.