When building a sovereign L1 on Tanssi, the Gas mechanism becomes a protocol-level decision. Developers can flexibly choose what the Gas token is, enable gasless on-chain experiences to lower the barrier for new users, provide fee subsidies for specific operations, or even design application-specific fee logic. These Gas strategies are not determined by the consensus layer but are enforced at the runtime layer, giving the application layer unprecedented autonomy. This design allows each application chain to optimize its economic model based on its own ecosystem needs, rather than being constrained by the general L1 Gas market.