Largest PoW smart-contract blockchain

Ethereum Classic (ETC) is often considered a top-5 Proof-of-Work chain because it retained PoW while major platforms such as Ethereum migrated to Proof-of-Stake, leaving ETC as the largest PoW smart-contract blockchain. After the Ethereum Merge, a significant amount of the Mining power shifted to ETC, raising its baseline hashrate and strengthening its security profile.
Its EVM-compatible Smart-Contract capability differentiates it from the remaining PoW networks, which are mainly currency-only!