An agent identity layer makes a lot of small writes — persona mints, skill manifest anchors, execution attestations, governance signals. On mainnet, those writes price out the long tail of contributors immediately. On most alt-L1s, the writes are cheap but the security story has to be argued from scratch.
Base sits in the right place for this. It is an L2 with mainnet security inheritance, it has the cheapest writes among credible OP-stack rollups, and the wallet and identity tooling around it has matured to the point where a developer can integrate without a side quest into infrastructure.
Anchoring on Base also keeps the protocol legible to the rest of Ethereum. Persona NFTs are standard ERC-721. Registries are ordinary contracts. Anyone running an indexer on Base picks Cleon up for free.
This is not a forever commitment. The protocol's content-addressed design means a future migration would move anchors, not identity. But for the next year of growth, Base is where Cleon scales.