The main feature of Classic is its commitment to the principle of blockchain immutability. ETC supporters believe that any data recorded on the blockchain should not be changed, regardless of the circumstances. This approach emphasizes the importance of decentralization and censorship resistance. Technically, Ethereum Classic is similar to Ethereum and supports the same features, including smart contracts and decentralized applications (dApps). However, over time, differences began to emerge between the projects. Ethereum Classic, for example, has not implemented upgrades such as the switch to Proof of Stake, which Ethereum implemented as part of its strategy to improve scalability and energy efficiency. The community is actively working to improve the security and resilience of the network. They have implemented several upgrades to protect the network from attacks such as 51% attacks, and continue to develop their technology to provide reliability and security for developers and users.