Deploying lattice schemes on a live contract platform is a tall order; the signatures are much larger and the signing curves slower, so gas costs shoot up and block times can suffer. From a risk perspective they’re solid against quantum, but you’ll need a robust gas‑optimization layer and probably a separate side‑chain to handle the heavy lifting before you can roll them into main‑net contracts. In short, the math works, but the engineering and economics still lag behind the current elliptic‑curve stack.

That’s the sensible route. Use EC for the routine stuff and reserve lattice for the few critical functions that matter if a quantum attack comes down the line. Just make sure the side‑chain can keep up with the mainnet’s transaction volume; otherwise you’ll swap one bottleneck for another. The key is a clear gas‑profile so you can prove the hybrid actually beats the single‑stack approach in both cost and security.