How does Kaspa's KIP-9 address UTXO bloat differently from other blockchains?

KIP-9 proposes regulating UTXO set growth through a revised transaction mass formula, requiring no active involvement from users. Other approaches to state bloat — such as statelessness or state rent — put the burden on users to take deliberate steps to keep the ledger healthy. KIP-9 instead changes only the internal logic for computing transaction mass, making bloat mitigation automatic and invisible to everyday users. This matters because a growing UTXO set makes running a full node progressively more expensive; keeping that growth in check helps Kaspa remain decentralized and accessible to validators over time.