My new CCS proposal for March, or possibly mid-February:

why is monero pow?

lord harnold: Better structure for an immutable decentralized consensus, arguably less susceptible to attacks/tampering compared to PoS, and overall better security.

That's a non-dev answer

ah, thanks

and is there a dev answer?

No problem. You'd probably benefit to listening to some of the talks hyc/ArticMine have had on Monero Talk. They are much more knowledgeable and go through what goes into Monero on the mining/mining algorithm portions.

Also Tevador etc

<lordharnold[m]> "and is there a dev answer?" <- There's no real way to incorporate PoS with the current ring signature scheme without breaking anonymity AFAIK

There's also general skepticism wrt PoS from most folks that work on monero I would guess

I think Zano is the only PoS cryptonote coin?

<jwinterm[m]> "There's also general skepticism..." <- I say, that PoS is an invitation to Ponzi Schemes. In other words: promoting richer participants at the cost of poorer ones.

At the same time promoting centralization.