Blockchains are designed for consensus and security, not fast data retrieval. As throughput increases and chains multiply, the gap between "data exists onchain" and "applications can actually use that data" gets wider. High-TPS chains like @Solana generate data faster than traditional indexing can process it. Cross-chain applications need unified access patterns across incompatible data structures. The scalability challenge is transforming raw blockchain logs into structured, queryable data at the speed applications demand.(The Graph)