Appchains excel at customization and sovereignty because they are purpose-built, independent blockchains. This allows protocols like dYdX (on its Cosmos-based chain) to optimize for specific needs—such as high-frequency order matching with zero gas fees for users—and control their entire tech stack. The trade-off is the significant initial effort required to bootstrap a new liquidity ecosystem and secure validator decentralization, which can delay major CEX listings until network effects are proven.