Gavin Wood and Mark Cachia are back to finish of that hefty pour of Kavalan Podium in A Glass With Gav Episode 3. In this episode Gavin shares his ideas mass market adoption of technology and how much further blockchain technology will need to progress before it truly hits the mainstream. On first generation blockchain technology he says, "Proof of Work is proof of waste... it's the fossil fuel of consensus." The introduction of "programmable money" and proof of stake in blockchain's second generation is an improvement, but lacks scalability. The problems that need to be solved for the third generation of blockchain are achieving "actual" decentralization, and scalability to the point where the volume and price point make it accessible to mainstream markets. Gavin argues that Ethereum's current scalability solutions are less secure (L2s) and far too computationally expensive (ZK SNARK) compared to Polkadot's Nominated Proof of Stake system.