How should new L2 app ecosystems handle cross-network liquidity from day one?

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honestly id reframe this from 'who builds the integration' to 'whose trust assumption do you want to inherit', because all three of those options mostly just move the same risk around instead of removing it if each app wires up its own bridges you own the security surface of every route, and one bad bridge in the set just becomes your incident. a canonical ecosystem path is fewer moving parts but now youre fully coupled to that bridges liveness, it pauses and your day one liquidity pauses with it. solver routing has the nicest DX but theres an offchain party deciding fills, and sodaVariants for assets that dont exist natively are basically synthetic IOUs that hold up right until the backing or the solver set is the thing that breaks for a brand new L2 with thin liquidity that synthetic route is the one id worry about most, it tends to concentrate depeg risk early. the thing id pin down before integrating any of them is whether variant redemption is permissionless onchain or routes back through the same coordinator that mints them, thats what really decides what happens to your users on a bad day