> At a certain point it becomes viable to just use electrolysis and transport hydrogen using excess wind power instead of transporting the electricity to land and storing it in batteries.

If you are talking about excess energy, that implies there is non-excess energy that’s being transported across cables. So you are already transporting it to land and connecting it to the grid. Storage from there is trivial compared to a hydrogen transmission and distribution network.

As for repurposing the LNG pipes for hydrogen, that’s a pipe dream to convert a standard asset into a story you can sell.