https://youtu.be/jFwzAZSghpw?si=LjxESJjnqm5JP-a8
TL;DR
1 Sunny discusses various alternatives to Proof of Stake including a section on "web of trust" based concensus and Proof of Useful Work.
2 Bearish on Cosmos Atom, A bit surprising he would be so Bearish... But i think he's not articulated quite right, or been quite fair. To say they have no devs can't be true... Atom has released Interchain security in the last 18 months or so (ICS)... And recently "Partial Set Security"... They are also road mapping "Mesh Security"... All of these are focused on creating ways to monetise the idea of shared security (providing the security of the ATOM validators to new "consumer chains")... I think that's incredibly innovative and obviously requires a good dev team
I think Sunny might be demonstrating a little bit of rivalry there... Despite the fact that the two chains are complimentary