While most blockchains are trying to scale within the limits of their original architecture, JAM from @polkadot completely redefines the model from 0.

Traditional chains like Ethereum rely on Layer 2s to offload traffic. Cosmos splits the ecosystem into independent zones with weak shared security.

Polkadot, before JAM, had parachains but remained bottlenecked by relay-chain limitations.

Solana offers high throughput but is still bound to a single chain and validator set, making scaling dependent on hardware improvements.

JAM changes everything by introducing a multi-core Web3 cloud capable of parallel execution at scale.

It’s not a single chain, you can see it as a supercomputer for Web3, built to host millions of smart contracts, agents, and services across multiple "cores."

Here’s what makes JAM stand out:

+ Massive scalability: Up to 1 million TPS per instance, with the JAM Grid pushing that into the billions.

+ Modular execution: Developers can build long-running services like in Web2, without splitting code into blocks or dealing with low-level blockchain logic.

+ Data-first: JAM introduces native high-bandwidth (857 MB/s) and multi-petabyte storage layers, essential for AI, gaming, and real-time apps.

+ Shared security: Every service benefits from Polkadot's economic security without needing its own validator set or token.

+ Cloud-like flexibility: Projects can use JAM like they use AWS or GCP, only here, the cloud is decentralized, verifiable, and censorship-resistant.

In short, JAM is not “just another L1”. It’s the first serious attempt to build a full decentralized compute cloud, one where the blockchain is invisible, scalable, and composable at internet scale.

This is how Web3 competes with Web2: not by mimicking old chains, but by offering a new, programmable infrastructure layer for the next generation of apps