The Unexplored Potential of Steam Engines

I think steam engines have an enormous amount of unexplored potential in the modern day, especially particularly closed cycle steam engines where you're condensing your working fluid. You can fast charge a boiler at rates of many megawatts without any problems and it doesn't degrade over time. The coolest thing about this is it could be much cheaper to manufacture, actually, than battery packs. It could be certainly using a lot less rare metals.