$DOT Recently, many people have been asking when JAM will go live?

JAM is a "architectural revolution", not a simple upgrade.

The original Polkadot Relay Chain + Parachain model is already quite complex.

The goal of JAM is to rewrite the entire underlying architecture of Polkadot from a "multi-chain system" to a "multi-core operating system" — this is almost equivalent to overturning the old architecture and rebuilding from scratch.

Such work cannot be completed in a few months; anyone who has written system architecture knows that a fundamental redesign is often more difficult than developing a new project.

The execution layer of JAM is entirely based on WebAssembly (WASM). This has advantages (universal, secure, portable), but also brings huge challenges:

1. Performance optimization is difficult:

WASM requires JIT (Just-In-Time compilation) to run efficiently; how to make on-chain execution fast and secure is a core challenge.

2. Complex security sandbox design:

Each Execution Environment must run in isolation and cannot affect each other, involving system-level sandbox technology.

3. State storage and verification compatibility:

JAM needs to support different EEs (such as EVM, ink!, Move); how to allow them to share state verification is an extremely complex issue.

The reason JAM's development progress is slow is not due to inefficiency, but because its underlying architecture is extremely complex and immutable.

In JAM, once the core code goes live, it is written into the blockchain consensus, and no node or person can change it again — this means that every line of code must withstand the test of time, verification, and attacks.

Every logic segment, every algorithm, and every interface must undergo formal verification and repeated scrutiny.

It is this extreme pursuit of security and perfection that makes JAM's development seem lengthy, but it also destined it to become the new core of Polkadot — a distributed operating system that is sustainable for ten years without compromise.