Aave's governance is moving to expand collateral optionality on the MegaETH instance by enabling WETH, BTC.b, and wstETH as general market collateral alongside their existing eMode configurations. The proposal reflects a deliberate calibration: while these assets already function as collateral within isolated, high-correlation sub-markets, they would be permitted in the main pool under more conservative loan-to-value and liquidation thresholds. This dual-track approach preserves the risk isolation framework that made MegaETH's launch configuration attractive while addressing a structural limitation that has begun constraining user behavior.
The technical foundation for this change traces to Aave v3.6's introduction of decoupled eMode collateral roles. Prior protocol versions forced a binary choice: an asset either functioned as collateral everywhere or nowhere. This coupling meant enabling an asset within a specialized eMode necessarily exposed it to the unconstrained dynamics of the main pool, where composition, liquidation speed, and oracle behavior become harder to predict. MegaETH's architects solved this by using v3.6's independence feature to restrict WETH, BTC.b, and wstETH exclusively to their respective eModes—tight, correlated sub-markets where risk parameters could be precisely calibrated without bleeding exposure into broader protocol activity. The tradeoff was intentional: users gained confidence that their collateral environment was bounded and monitorable, but they lost the ability to combine assets across eMode buckets.
That tradeoff now appears unnecessarily restrictive. Aave's single-active-eMode limitation means a user cannot simultaneously hold positions in both the WETH/stablecoins eMode and the BTC.b/stablecoins eMode, even if their risk appetite and liquidation expectations would otherwise support such exposure. Cross-margin demand on emerging deployments has historically remained modest, yet excluding it entirely blocks legitimate use cases without corresponding safety gains. The proposal responds by introducing general market parameters calibrated conservatively relative to the eMode versions—lower LTVs and liquidation thresholds that reflect the heightened complexity of monitoring these assets in an unconstrained collateral mix.
The governance signal here matters beyond MegaETH itself. It suggests Aave is comfortable moving beyond the hypothesis that maximum risk segmentation requires maximum structural isolation, and instead trusts its parameter-setting discipline to enable flexibility without sacrifice. This shift toward measured expansion rather than locked configurations could reshape how future Aave deployments balance innovation with conservatism.