The article doesn't mention it, but another example of the "electric makes things better" mentality is trains. Trains are in some respects easier to electrify than even trucks, let alone ships, by virtue of them being on fixed tracks (no need for batteries on electrified tracks except as a backup in case of power outages) and by virtue of train cars being readily swappable (so even on not-yet-electrified networks, trains could swap their depleted battery cars for fresh ones at the station). Plus, freight trains support intermodal containers just like container ships do, so they can share the same sorts of battery-in-a-container idea.