Statistical Verification Without Full Block Downloads
In a monolithic blockchain, every validating node must download and execute every single transaction in every block, creating an unyielding physical ceiling on scalability. Modular data availability layers solve this through Data Availability Sampling (DAS).
Light nodes can verify with 99.999% mathematical confidence that an entire block's data has been published to the network simply by requesting a small random sample of erasure-coded chunks, allowing the network to process tens of thousands of transactions per second safely.