> There is a large gulf between something that has worked in a research lab once and something that is ready to be commercialized and ready to be implemented in

> There is a large gulf between something that has worked in a research lab once and something that is ready to be commercialized and ready to be implemented in a working ship. Your point is correct generally speaking. But here we are comparing modifying a combustion engine to make it burn hydrogen, versus modifying a ship to make it run on nuclear power. Which gap do you think is wider?