why does every new chain launch its own DEX from scratch instead of plugging into shared infrastructure

New blockchain chains frequently launch their own decentralized exchanges (DEXes) from scratch, leading to poor liquidity, subpar user experiences, and redundant development. The article critiques this pattern and suggests a shared cross-chain order book (CLOB) infrastructure to enable instant liquidity and avoid reinventing the wheel, drawing parallels to traditional finance's use of standardized exchange infrastructure.