How does Kaspa keep memory usage bounded as its commitment system grows?

Kaspa's KIP-0021 design enables bounded-memory behavior by purging inactive lanes from memory using blue score as the inactivity clock. Blue score is Kaspa's measure of how deeply confirmed a block is in the blockDAG — roughly analogous to block depth in a traditional blockchain. When a lane (a channel tracking a particular state) has gone untouched for long enough as measured by blue score, the system can safely discard it rather than holding it in memory indefinitely. This matters for beginners because it means Kaspa's commitment architecture is designed to stay lean and efficient even as the network and its feature set grow over time — unused state gets cleaned up automatically instead of accumulating without limit.