Polygon co-founder Sandeep Nailwal has criticized the Ethereum community for not fully appreciating Polygon's contributions as a layer 2 solution. Nailwal expressed frustration over the perceived lack of recognition and support from the Ethereum Foundation, highlighting Polygon's advancements such as zk-EVM and Polymarket hosting. In response, Ethereum co-founder Vitalik Buterin acknowledged Polygon's achievements but pointed out technical gaps in its layer 2 implementation. Buterin emphasized the importance of adopting a robust proof system to achieve full layer 2 status, suggesting that while progress has been made, further development is necessary for complete integration.